Trunkfish

Lactophrys trigonus

Fun facts for your next surface interval

Its box is formed from joined enlarged scale plates. [source]
It has no pelvic fins. [source]
The armor is partly open behind the dorsal-fin base. [source]

Florida and local context

Lactophrys trigonus 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

A humped, box-shaped fish with dark-edged plates making a honeycomb pattern. It has no horns in front of the eyes, but a pair of spines at the lower rear corners. Young fish may be orange or lime green.

Sources: Smithsonian Tropical Research Institute: Trunkfish

Size and life stages

The regional maximum is 55 cm, about 22 inches. Juvenile color is not a reliable guide to the eventual adult appearance, and a small fish should not be named by color alone.

Sources: Smithsonian Tropical Research Institute: Trunkfish

Habitat and where to look

Mainly associated with seagrass, with additional records from rubble and offshore reefs. Follow its route visually without moving plants or stones for a clearer view.

Sources: Smithsonian Tropical Research Institute: Trunkfish

Range and local context

The regional account extends from Massachusetts to Brazil and Ascension Island. Local inclusion rests only on the supplied Blue Heron Bridge REEF report, not a blanket corridor-wide claim.

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

What is on the menu?

An omnivore whose listed foods include small bottom animals and plant material. A small mouth does not mean a single-food diet. Record the feeding surface without baiting.

Sources: Smithsonian Tropical Research Institute: Trunkfish

Daily habits and behavior

The database identifies it as bottom-associated. Watch how it investigates the habitat without assuming every pause is feeding. The reviewed material does not establish a local daily routine.

Sources: Smithsonian Tropical Research Institute: Trunkfish

Mating and the next generation

Eggs and larvae are listed as pelagic. This supports a water-column early stage but does not establish a local spawning season or visible nest.

Sources: Smithsonian Tropical Research Institute: Trunkfish

Look-alikes and identification traps

Other boxfishes can look similar from the front. A side view should include the humped back and rear lower spines. Color alone is especially unreliable for juveniles.

Sources: Smithsonian Tropical Research Institute: Trunkfish

Observe without disturbing

Never catch or handle a trunkfish for a photograph. Give it room to move without being pressed against structure, and do not use the armored appearance as an invitation to touch.

Sources: Smithsonian Tropical Research Institute: Trunkfish

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?

Lactophrys trigonus falls within trunkfishes and cowfishes, family Ostraciidae. 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.

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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