Fish identification archive / Threespot Damselfish

Threespot Damselfish

Stegastes planifrons

Fun facts for your next surface interval

A bright yellow juvenile becomes a much duller adult. [source]
The adult tail-base spot is not always visible. [source]
Its lateral line ends before reaching the tail. [source]

Florida and local context

Stegastes planifrons is a species-level row in the Blue Heron Bridge (WPB), Phil Foster Park report. This is cumulative citizen-science evidence, not an independently reidentified voucher or a guarantee of a current sighting.

A documented past record does not establish present abundance or guarantee an encounter.

Sources: REEF: named-site cumulative diver survey supplied with reservation

How to recognize this animal

Juveniles are bright yellow with dark marks at the dorsal-fin base and upper tail base. Adults become gray-brown, retaining a dark pectoral-base spot and sometimes a tail-base mark. Life stage matters more than counting three visible spots.

Sources: Smithsonian Tropical Research Institute: Threespot Damselfish

Size and life stages

The regional maximum is 12.5 cm, about 5 inches. Do not use the brilliant juvenile pattern as an adult size or sex indicator.

Sources: Smithsonian Tropical Research Institute: Threespot Damselfish

Habitat and where to look

This is a shallow-reef damselfish. Observe around structure without pushing through coral or lifting rubble. Habitat is a search clue, not proof of identity.

Sources: Smithsonian Tropical Research Institute: Threespot Damselfish

Range and local context

The regional account extends from Bermuda to the southern Caribbean. The supplied Blue Heron Bridge survey is the specific local evidence; it does not demonstrate abundance along the whole coastal corridor.

Sources: Smithsonian Tropical Research Institute: Threespot Damselfish; REEF: named-site cumulative diver survey supplied with reservation

What is on the menu?

The database includes algae and varied small animal foods. Its broad feeding categories should not be read as the proportions of a local fish’s diet. A visible bite is better evidence than proximity to coral.

Sources: Smithsonian Tropical Research Institute: Threespot Damselfish

Daily habits and behavior

The reviewed account establishes bottom-associated reef use but not a local activity schedule. Watch and record actual movements rather than assigning a territory or nest from one brief encounter.

Sources: Smithsonian Tropical Research Institute: Threespot Damselfish

Mating and the next generation

The account includes bottom-associated eggs, but its larval classifications are internally inconsistent. A detailed developmental claim is withheld pending a species-specific primary reproduction source. No local spawning calendar is asserted.

Sources: Smithsonian Tropical Research Institute: Threespot Damselfish

Look-alikes and identification traps

Other Stegastes damselfishes can resemble both age stages. Match the position of the dark marks to the life stage, not simply yellow coloration. Include the dorsal fin and tail base in the frame.

Sources: Smithsonian Tropical Research Institute: Threespot Damselfish

Observe without disturbing

Keep a respectful distance from structure and any repeatedly returning fish. Do not test aggression with a hand or camera. If an animal repeatedly reacts to your presence, move away.

Sources: Smithsonian Tropical Research Institute: Threespot Damselfish

Harvest, protection and eating safety

Live-only ornamental collection; closed sites apply

Yellow denotes conditional live ornamental collection, never food harvest. Closed collection sites override statewide bag allowances. No year-round open season is inferred from the absence of dates.

This color is a qualified summary, not permission to collect or a guarantee that a particular animal is safe to eat.

Can it be hunted or harvested?

Stegastes planifrons falls within damselfishes, family Pomacentridae. Florida recreational marine-life rules require live landing and continued live maintenance with suitable circulation, aeration or oxygenation. Where collection is lawful, the normal limit is five of a species within 20 total marine-life organisms per person daily; two-day possession is ten of a species within 40 total. A recreational saltwater license is required unless exempt; recreational sale is prohibited. No additional species-specific size restriction is stated for this taxon in the reviewed FWC table.

Florida seasons and areas

Florida marine-life requirements also apply in adjacent federal waters. Listed marine-life collection is prohibited in the mapped Blue Heron Bridge Special Marine Life Area, not throughout Palm Beach County. Pennekamp prohibits tropical-fish collection. Biscayne National Park prohibits ornamental collection except under a valid superintendent-issued collecting permit. This is not permission to seek or use such a permit. Check the exact site, not just the county. Florida Keys Sanctuary Preservation Areas prohibit fishing and collection, subject to specifically stated exceptions; the Key Largo Management Area separately prohibits tropical-fish take and spearfishing. Biscayne National Park has additional rules, including a mapped March 1–May 31 fishing closure effective in 2026. These are not whole-county bans.

Can it be speared?

Do not spear this live-only marine-life species. Use only authorized nonlethal collection methods where collection is permitted. Location restrictions still apply: spearfishing is prohibited in Monroe state waters from Long Key, including Long Key, north to the Miami-Dade line. This state-water restriction is separate from the Key Largo Management Area prohibition. Florida also restricts spearfishing around swimming beaches, fishing piers/bridges, jetties and state parks; federal water alone is not permission to spear in a closed sanctuary zone.

Is it safe to eat?

Not a recreational food-harvest fish under these live-only rules. No recipe, preparation method or food-safety clearance is provided. A harvest allowance is not a food-safety clearance. Check current Florida Department of Health advice for the capture location, species and person eating the fish. This review establishes no meal frequency and no local restaurant menu match.

This review covers the Vero Beach–Key Largo Atlantic corridor: Indian River, St. Lucie, Martin, Palm Beach, Broward, Miami-Dade and Monroe counties. Florida Atlantic state waters and South Atlantic federal waters are distinct jurisdictions. Do not extend a state-water season tag to federal waters or transfer Atlantic rules to Gulf-side Keys waters. Park and sanctuary boundaries can override a species allowance.

Before you act: Confirm the species, date, exact management area, state or federal waters, gear, licenses and current local closures. A local occurrence record never grants permission to take an animal.

Official rules and health guidance

Reviewed 2026-11-11. Rules and advisories can change; check the linked authorities before acting.

Identification and source cautions

The local evidence is a cumulative citizen-science record supplied in the reservation, not an independently reidentified voucher or a current encounter probability.
Broad range and habitat accounts do not establish presence at every site between Vero Beach and Key Largo.
Maximum length is a reported upper size, not a typical local encounter size.
Smithsonian reproductive fields list both pelagic larva and no pelagic phase; larval dispersal detail is withheld.

Sources and review

Biology and taxonomy reviewed 2026-11-11. Photographs on cited sites are reference material and are not reproduced here.

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