Sharks · Saltwater
Atlantic sharpnose shark
Rhizoprionodon terraenovae
Small, abundant requiem shark of the western Atlantic and Gulf of America, from New Brunswick, Canada to the Yucatan; one of the most commonly encountered inshore/nearshore sharks by recreational anglers in the southeast U.S.
Also called sharpnose.
- Surf
- Inshore
- Nearshore
- Regulated context
- 4 of 4 overlays reviewed
- Reviewed 2026-08-27
Before you target this fish
Regulated context — check the rules for the exact water
Where this applies Federal Atlantic HMS EEZ waters (NOAA Fisheries) and Florida state waters (FWC) at minimum; every other Gulf and Atlantic coastal state sets its own rules again.
The reviewed context, unedited
Federal Atlantic HMS rules (NOAA Fisheries) govern federal EEZ waters; Florida state waters are governed separately by FWC, and every other Gulf/Atlantic coastal state sets its own rules again. The two regimes do not match field-for-field. Atlantic sharpnose is the most permissive of the four species in this batch: both NOAA's federal rule and FWC's Group 1 state-waters rule set no minimum size. The two regimes still diverge on bag-limit accounting — NOAA's federal rule is 1 shark per person per trip, while FWC's shore-based rule is 1 shark per person per day with a 2-shark-per-vessel cap — and on permitting: a vessel angler in federal waters needs an HMS Angling/Charterboat permit plus shark endorsement, while a shore-based angler in Florida state waters needs FWC's separate no-cost Shore-Based Shark Fishing permit and course instead. Both regimes require non-offset, non-stainless circle hooks with natural bait. Because this species schools with, and at small sizes can be visually confused with, juvenile blacktip, spinner, and other small coastal sharks, misidentifying a juvenile prohibited species (e.g., a young dusky or sandbar shark) as sharpnose remains a real risk even though sharpnose itself carries the lightest rule set of the four. A proposed federal rule (Federal Register, published 2026-01-05, comment period closed 2026-03-06) would revise blacktip and spinner minimum size to a default 48 in and move Atlantic sharpnose and bonnethead bag limits from per-person to a per-vessel default with an annually adjustable range; as of the last check this session made, it had not been finalized. Confirm current status before relying on any figure here. Misidentification carries legal exposure: several similar-looking requiem and hammerhead sharks are federally and/or state prohibited, and a prohibited shark must be released without removing it from the water. Verify identification and the rule set for the exact water (state vs. federal) before harvest.
Rules for this fish change at a state line and sometimes inside one. Check the ones that apply to the exact water you are standing on before you act on anything here — this record is biology, not permission.
Take this somewhere
This page is the record. The reading is what happens when you add water, a season and a temperature to it — that is where the families below get ranked against each other instead of just listed.
Those three links carry the fish and nothing else. No conditions were declared on this page, so none travel, and the link says so rather than sending an empty reading.
The half nobody publishes
What this record does not know
Everything else on this page comes from a named agency or peer-reviewed source. This is the other side of that: the questions a reviewer went looking for an answer to and came back without, and the fields the record leaves empty because filling them would mean guessing.
It is here rather than at the bottom because a page that only shows what it knows is easy to read as a page that knows everything. For Atlantic sharpnose shark there are 11 of them.
Named by a reviewer
8Somebody looked for this and wrote down that they did not find it.
- Behaviour
Diel tendency, current-facing, depth movement, and thermal-driven behavior not sourced.
No water-temperature figures were found tying the inshore/offshore seasonal migration to a specific thermal threshold.
- Identification
NOAA's own species page gives two different maximum-length figures (32 in in running text vs. 4 ft in its quick-facts box); this record states the disagreement rather than picking one.
Typical weight not found.
Direct field-mark comparison to blacknose shark and Caribbean sharpnose shark not found; both are noted as lookalikes without a sourced distinguishing feature.
- Forage
Seasonal and life-stage diet emphasis not sourced beyond the general prey list.
- Season
No water-temperature thresholds tie the inshore/offshore seasonal movement to a specific figure.
Fall-specific behavior is inferred as transitional rather than directly sourced.
Absent from the record
3No reviewer wrote a gap here. The field is simply empty, which is its own answer.
- Water temperature
The temperature figures describe where this fish is found and caught, not a measured preference. Those are different claims and the record only has the weaker one.
- Identification
No reviewed image. A photograph is only in this catalog when an agency or a named creator labelled the subject, and nobody has cleared one for this species yet.
- Population context
No regional population profile is registered. The species-level reading stands on its own; it does not silently become a local one.
Where the record puts it
Water and range
Surf
2 reviewed holding classes- Surf trough
- Inner sandbar
Inshore
3 reviewed holding classes- Marsh edge
- Channel edge
- Tidal creek
Nearshore
2 reviewed holding classes- Inlet mouth
- Nearshore hump
DepthNOAA states this species typically remains in water less than about 32 ft deep; NOAA also describes a seasonal inshore/offshore movement (see seasonal_calendar).
Moving waterNOAA describes this species using bays, estuaries, harbors, and surf zones over mud and sand bottoms; not resolved to a finer current-use pattern from a sourced account.
LightNot resolved from an agency or peer-reviewed source in this review; recorded as a gap.
Thermal band
Temperature
- Cold edge
- 68°F
These describe where the fish is found, not what it prefers.
Gillnet survey catch data from the north-central Gulf of Mexico (Parsons and Hoffmayer 2005, Copeia) show sharpnose sharks begin appearing inshore in spring once water temperature approaches 20-22°C (68-72°F), consistent with NOAA's general description of a winter offshore / spring-summer inshore migration. This is survey-catch (distribution) evidence, not a lab or telemetry preference. The same study also describes an inverse relationship between abundance and temperature in summer and a fall departure, but the exact figure and its direction were not resolved with confidence from the sources available in this pass -- a human should check the primary paper before adding a warm-side figure.
How it uses water
Behaviour
Described in NOAA sources as common and abundant inshore, consistent with loose aggregation rather than solitary habits, though a dedicated schooling-behavior account was not found.
NOAA describes a diet of small fish (menhaden, eels, silversides, wrasses) taken by pursuit, plus invertebrates (worms, shrimp, crabs, mollusks) that imply some benthic foraging as well.
Not resolved to a specific diel pattern from a sourced account this session; recorded as a gap.
Seasonal activityNOAA describes a seasonal inshore/offshore migration: this species moves to deeper offshore water in winter and returns to inshore water in spring to mate and give birth.
Facing the currentNot resolved from a sourced account; recorded as a gap.
Spawning (conservation context)Annual mating mid-May through mid-July in inshore waters; 10-11 month gestation; about four pups per litter delivered in nearshore areas each June. Recorded as conservation context only.
What it can eat
Forage
- Small forage fish
- Crustaceans
- Mollusks
- Worms / annelids
NOAA describes the diet as small fish including menhaden, eels, silversides, and wrasses, plus invertebrates: worms, shrimp and crabs (crustaceans), and mollusks. Diet capacity is not evidence of a current bait event.
- Feeding style
- Opportunistic
- Feeding zone
- Mixed
Diet capacity described here is not proof that a bait event is occurring on any given day. Observed current forage still comes from a user observation or Hatch Match.
Through the year
Season
Winter
- Where they sit
- Deeper offshore water, per NOAA's described seasonal migration.
- Movement
- Moves out of inshore bays/estuaries/surf zones into deeper water offshore.
What that changesNearshore bottom-contact fishing is the reviewed family that best fits a winter offshore posture within the water types this catalog covers; no offshore-specific presentation is claimed here.
What would count against it
- fishing inshore flats/creeks for this species in winter on the assumption it behaves the same as in spring/summer
Spring
- Where they sit
- Returns to inshore bays, estuaries, and surf-zone habitat over mud and sand to mate.
What that changesTidal drift bait and live/natural bait suspension in bays and creek mouths, plus surf bait soak in the surf zone, are the reviewed families that fit a small bottom/mid-water opportunistic feeder returning inshore.
What would count against it
- treating the spring return as a predictable bite window
Spring mating is biology, not a targeting cue.
Early summer
- Where they sit
- Inshore bays, estuaries, and nearshore water; mating continues into mid-July and pups are delivered nearshore in June.
What that changesSame reviewed inshore/surf families as spring.
What would count against it
- treating June pupping activity as a bait or bite signal
June pupping is conservation context; no pupping location is identified.
Summer
- Where they sit
- Inshore bays, estuaries, harbors, and surf zones over mud and sand, per NOAA's habitat description.
What that changesSame reviewed inshore/surf families as spring/early summer.
Fall
- Where they sit
- Transitional; NOAA's account implies a shift back toward deeper offshore water begins as winter approaches, though a specific fall-only account was not found.
What that changesSame reviewed inshore/nearshore families, shifting toward nearshore bottom contact as the season progresses.
What would count against it
- assuming a hard, dated cutover from inshore to offshore behavior
Spawning · Spring, Early summer
NOAA gives annual mating mid-May through mid-July in inshore waters, a 10-11 month gestation, and about four pups per litter delivered in nearshore areas each June, with females maturing around age 2 (Atlantic stock) or 1.3 years (Gulf stock). Recorded as conservation context only; no pupping location is identified.
Recorded as conservation context. No spawning site, staging concentration or migration bottleneck is named anywhere in this catalog, because naming one is how a population gets fished out.
Telling it apart
Identification
What to look at
- Long, pointed snout — the basis for the common name, and generally longer/more slender than the snouts of small Carcharhinus species such as blacknose or finetooth shark.
- Adults show white spots scattered on the back and sides, plus pale edges on the pectoral fins — a mark NOAA's tagging-program guide specifically uses to separate Atlantic sharpnose from finetooth shark, which lacks the white spotting.
- Second dorsal fin originates over or behind the middle of the anal fin (NOAA tagging-program ID guide, given in the finetooth-shark comparison).
- Juveniles show black edging on the dorsal and caudal fin margins, which is not present, or much reduced, in adults.
- 24-25 rows of small triangular teeth in each jaw (NOAA species overview) — a lab/hand-examination feature, not a field mark for a fish still in the water.
- Average adult length
- NOAA's species page gives two figures for maximum size that do not agree with each other: the page's running text states 'up to 32 inches,' while its quick-facts summary states 'up to 4 feet' (48 in). This internal disagreement is recorded here rather than resolved by picking one.
- Common angling size
- Females mature around 24 in (Atlantic stock, ~age 2) or 25 in (Gulf stock, ~age 1.3 years) per NOAA; most inshore recreational catches are mature or near-mature fish in this size range.
- Typical weight
- Not found in an agency source reviewed this session; recorded as a gap.
- Maximum documented
- See averageAdultLength — NOAA's own page gives conflicting maximum-length figures (32 in vs. 4 ft) that this record does not resolve.
- Longevity
- NOAA: up to 18 years.
What it gets confused with
- Finetooth shark (Carcharhinus isodon)
- NOAA's tagging-program guide draws this comparison directly: Atlantic sharpnose has white spots on the back and sides and a second dorsal fin over or behind the middle of the anal fin; finetooth lacks the white spotting.
- Blacknose shark (Carcharhinus acronotus)
- Both are small, open-for-harvest requiem sharks placed in FWC's no-minimum Group 1, so the regulatory stakes of confusing them are low, but they are frequently caught together inshore. A dedicated field-mark comparison was not found in the sources reviewed this session; recorded as a gap rather than invented.
- Caribbean sharpnose shark (Rhizoprionodon porrosus)
- A close congener with a similar long-snouted body plan; the two are best separated in southern Gulf/Caribbean waters where ranges overlap. A specific field-mark comparison was not found in the sources reviewed this session; recorded as a gap.
- Juvenile blacktip or spinner shark
- Small juvenile blacktip/spinner can be superficially similar in size and general shape to an adult sharpnose; the long, sharply pointed sharpnose snout and its white side-spotting are the clearest quick separators from the rounder-snouted, black-fin-tipped blacktip/spinner juveniles.
What follows from all of that
Presentation families
Surf
Surf bait soak
Hold a natural bait still on the bottom of a trough or cut and let moving water bring fish to it.
- enough lead to hold
- read the trough
- let the rod load
- reset as the tide moves the bar
What it asks of the tackle
- Depth control
- Low
- Sensitivity
- Moderate
- Casting distance
- Long
- Weight range
- 2–8 oz of lead
- Cover resistance
- Moderate
- Line visibility
- Secondary
- Retie frequency
- High
Horizontal retrieve
Move a swimming bait through a chosen depth band along structure or open water.
- count down
- steady or pulsing retrieve
- keep the band
- cover the edge
What it asks of the tackle
- Depth control
- Moderate
- Sensitivity
- Moderate
- Casting distance
- Moderate to long
- Weight range
- 1/8–1/2 oz
- Cover resistance
- Moderate
- Line visibility
- Low
- Retie frequency
- Low
Inshore
Tidal drift bait
Let a natural bait travel at the speed of the tide along an edge fish are feeding on.
- match weight to the run
- stay in the seam
- let it swing at the end
- reset up-tide
What it asks of the tackle
- Depth control
- Moderate
- Sensitivity
- High
- Casting distance
- Short to moderate
- Weight range
- 1/8–1 oz
- Cover resistance
- Moderate
- Line visibility
- Low
- Retie frequency
- High
Live / natural bait suspension
Present a natural food form with enough life or scent to hold in a station without looking mechanical.
- keep it alive or fresh
- match the holding depth
- minimize hardware bulk
- detect without pulling it away
What it asks of the tackle
- Depth control
- High
- Sensitivity
- High
- Casting distance
- Short to moderate
- Weight range
- As light as conditions allow
- Cover resistance
- Moderate
- Line visibility
- Low
- Retie frequency
- High
Nearshore
Bottom contact
Keep a bait on or just above the substrate along a break, flat, or inside a weed edge.
- feel bottom
- drag or hop
- pause on the break
- stay in contact
What it asks of the tackle
- Depth control
- High
- Sensitivity
- High
- Casting distance
- Moderate
- Weight range
- 1/8–1/2 oz
- Cover resistance
- High
- Line visibility
- Low
- Retie frequency
- High
Live / natural bait suspension
Present a natural food form with enough life or scent to hold in a station without looking mechanical.
- keep it alive or fresh
- match the holding depth
- minimize hardware bulk
- detect without pulling it away
What it asks of the tackle
- Depth control
- High
- Sensitivity
- High
- Casting distance
- Short to moderate
- Weight range
- As light as conditions allow
- Cover resistance
- Moderate
- Line visibility
- Low
- Retie frequency
- High
What moves them for this fish
Reviewed rules that push particular families up when the conditions match. Each one names the conditions it needs and why it exists, so you can disagree with it.
NOAA describes this species moving out of inshore bays and surf zones into deeper offshore water in winter, so within the water types this catalog covers, a bottom-oriented nearshore presentation fits that posture better than a mid-water or surf approach.
When
Nearshore · Winter
Moves up
Bottom contact
Reviewed 2026-08-30
NOAA describes this species returning to inshore bays, estuaries, and creek mouths from spring through summer, matching its small bottom/mid-water opportunistic feeding style to bait presentations that work an edge or hold a station in that water.
When
Inshore · Spring or Early summer or Summer
Moves up
Tidal drift bait, Live / natural bait suspension
Reviewed 2026-08-30
The same spring-through-summer inshore return puts this species in surf-zone habitat over mud and sand, where a bait held on the bottom fits its benthic and small-fish diet better than active surf presentations.
When
Surf · Spring or Early summer or Summer
Moves up
Surf bait soak
Reviewed 2026-08-30
Where every sentence came from
Sources
Agency
NOAA Fisheries, Atlantic Sharpnose Shark species overview
Used for habitat, thermal band and presentation families; identification; behaviour; forage; season. Read 2026-08-30, next check 2026-11-27.
Agency
NOAA Fisheries, Shark Identification for the Cooperative Shark Tagging Program (C-P species)
Used for habitat, thermal band and presentation families; identification. Read 2026-08-30, next check 2026-11-27.
Agency
NOAA Fisheries, Atlantic Sharpnose Shark: Science
Used for habitat, thermal band and presentation families. Read 2026-08-27, next check 2026-11-27.
Agency
NOAA Fisheries, Recreational Atlantic Shark Fishery Statuses, Minimum Sizes, and Retention Limits
Used for habitat, thermal band and presentation families. Read 2026-08-27, next check 2026-11-27.
Agency
Used for habitat, thermal band and presentation families. Read 2026-08-27, next check 2026-11-27.
Agency
NOAA Fisheries, HMS Recreational Compliance Guide 2025 (permit, shark endorsement, circle hook rule)
Used for habitat, thermal band and presentation families. Read 2026-08-27, next check 2026-11-27.
Agency
Used for habitat, thermal band and presentation families. Read 2026-08-27, next check 2026-11-27.
Peer reviewed
Used for habitat, thermal band and presentation families. Read 2026-08-27, next check 2026-11-27.
A source with no link predates the rule that one has to carry a URL. It is still a real citation and still checkable; it just takes a search rather than a click, and that is worth knowing before you rely on it.