Fish identification archive / Mahogany snapper

Mahogany snapper

Lutjanus mahogoni

Fun facts for your next surface interval

A spot on the line: Its dark flank spot crosses the lateral line rather than sitting entirely above it.
Small-group outing: Adults can drift alone or in small groups around reef structure.
A youthful head stripe: Young fish can show a more prominent oblique head stripe.

Florida and local context

Reported in REEF diver surveys at Blue Heron Bridge (WPB), Phil Foster Park. Cumulative survey records document occurrence, not a guaranteed encounter or present-day abundance.

Documented regional presence is not a guarantee of an encounter or a measure of how common this animal is at your dive site.

How to recognize this animal

Mahogany snapper have olive-gray upper sides, a silvery to coppery lower body and reddish fin edges. The conspicuous dark flank spot sits near the transition into the soft dorsal region and crosses the lateral line. The eye is relatively large, the tail slightly forked and the anal fin rounded. Those features help distinguish a modestly colored individual from other spotted snappers without relying on red coloration alone.

Size and life stages

Smithsonian and Florida Museum both report a maximum near 48 cm, about 19 inches. Florida Museum describes an average around 38 cm, or 15 inches; that is a general profile figure rather than a measured South Florida average. Young fish can show a stronger oblique stripe through the eye, and their colors should not be copied directly from an adult illustration.

Habitat and where to look

This is a clear-water reef fish found around coral and rocky structure, with some use of adjacent sand and seagrass. Juveniles use shallow water. Florida Museum emphasizes warm shallow settings, although the broader Smithsonian compilation extends to 209 m. Such a maximum is useful for understanding the species' records, not for choosing a recreational dive depth or predicting where most sightings occur.

Range and local context

The species occurs in the western Atlantic, including Florida, the Gulf of Mexico and Caribbean waters. Smithsonian extends the documented range south into Brazil, farther than some older summaries. Reported in REEF diver surveys at Blue Heron Bridge (WPB), Phil Foster Park. Cumulative survey records document occurrence, not a guaranteed encounter or present-day abundance.

What is on the menu?

Mahogany snapper feed on small fishes and invertebrates. Florida Museum lists shrimp, crabs and cephalopods and describes feeding mainly at night. Small grunts are among the reported fish prey. An individual hovering over coral during daylight is therefore compatible with the species' feeding ecology without showing a feeding event itself.

Daily habits and behavior

Fish may appear alone or in small groups, drifting around reef structure, gorgonians, crevices and caves. Record the number seen and the actual habitat rather than assuming every group is a school moving to spawn. The large dark spot and fin borders are useful to photograph as the fish turns, because its overall gray or reddish tint can change with lighting and viewing angle.

Mating and the next generation

Eggs and larvae are pelagic, with early life carried in the water column before juveniles settle into protective habitat. Florida Museum describes warm-season spawning, but this guide does not apply that broad account as a precise Palm Beach calendar. A small group over a reef is not enough evidence to identify a reproductive aggregation.

Look-alikes and identification traps

Lane and mutton snappers also carry a dark flank spot. Compare the entire fish: the location of the spot relative to the lateral line, the large eye, the rounded anal fin and the absence of the lane snapper's conspicuous yellow striping are more useful together than any one feature. Mutton snapper have different head markings and a more pointed anal-fin outline. Poorly lit juveniles may require tentative identification.

Observe without disturbing

Watch from outside the shelter opening and leave fish free to move between coral branches or into a crevice. Never move a gorgonian or touch coral to obtain a clear photograph. The species has been associated with ciguatera reports, so neither its identity nor a food-fish label establishes safety to eat. Harvest and seafood guidance require the separate review.

Harvest, protection and eating safety

Conditional harvest; rules and location must be checked

Yellow means collection or harvest is conditional on current rules and location. It is not permission to harvest or an assurance that the fish is safe to eat.

This color is a qualified summary, not permission to collect or a guarantee that a particular catch is safe to eat. Read the current rules and health guidance below.

Can it be hunted or harvested?

FWC lists a 12-inch total-length minimum and up to ten fish per person within the ten-snapper aggregate on Atlantic and Gulf tables. Reef-fish gear, licensing, area and intact-fish requirements must be checked. Do not confuse this species with a different snapper having a different minimum or closure. Rule 68B-14.001(1)(c) extends this chapter’s Florida rules to adjacent federal EEZ waters for the expressly named species when no federal regulations apply. This species is expressly named. Federal management-list omission is therefore not a recreational exemption. Commercial permit exemptions do not remove these recreational requirements.

Florida seasons and areas

FWC lists year-round recreational season for this species on both coasts, subject to emergency and local closures. Grouper’s all-Monroe Atlantic boundary exception must not automatically be copied to snapper. Check the precise capture position, jurisdiction and transit route. Keys sanctuary preservation, conservation, research and restoration zones can override general allowances. Within the designated Western Dry Rocks boundary, fishing is closed April 1–July 31; continuous transit requires fish and gear properly stowed. Biscayne’s designated bonefish pre-spawning area prohibits fishing and fish possession March 1–May 31, with a properly stowed continuous-transit exception. These are mapped area rules, not statewide closures.

Can it be speared?

Conditionally possible only when harvest is otherwise legal and the fish can be positively identified before shooting. Species limits, closed seasons and area restrictions still apply. FWC prohibits spearfishing in Monroe County from Long Key north to the Miami-Dade line, near designated public beaches/piers/bridges and jetties, and in applicable park waters. No powerheads, bangsticks or rebreathers. This is not permission for a particular dive site.

Is it safe to eat?

Grouper and snapper can carry ciguatera toxin. Cooking, freezing or marinating does not remove it, and smell/taste do not identify it. Avoid head, viscera and roe of reef fish. No blanket safe-to-eat assurance. Consult current Florida DOH advice for the exact fish, capture water and consumer, particularly pregnancy, nursing and children; this guide does not establish a species-specific meal allowance. Legal harvest and normal appearance do not establish food safety.

Blue Heron Bridge is an observation site: marine-life harvest is prohibited within the designated dive-site boundary. A local occurrence record is not permission to collect or spear.

Before you act: This recreational overview is not permission to collect or spear at your dive site. Confirm the species, date, management area, state or federal waters, gear, licenses and current local closures. Identification artwork cannot establish an identification or guarantee seafood safety.

Official rules and health guidance

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

Sources and review

Reviewed 2026-11-11.

Make your next dive happen

Review current dates, availability, prices, inclusions and requirements on each listing before booking or buying.

Call us now

(772) 600-8288

Ask about marine life identification

Marine Life Identification

Ask about dates, prerequisites or your next step. An inquiry does not reserve a place. Please provide your own contact details; do not include medical, payment or a child's personal information.

We use these details to respond to your inquiry. This form does not sign you up for marketing.