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Bridled Goby

Coryphopterus glaucofraenum

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Original side-profile illustration of Bridled Goby (Coryphopterus glaucofraenum); a dark double-peaked triangular mark above the gill cover is a useful first clue.
Original identification illustration of Bridled Goby. Features may vary.

Fun facts for your next surface interval

  • Its lower flank markings can resemble a row of little Xs.
  • A tiny double-peaked mark above the gill cover is more informative than the general sandy color.
  • Two dark spots at the tail base are part of a multi-feature identification, not a complete diagnosis by themselves.

Florida and local context

Lake Worth Lagoon, Palm Beach County, Florida: The exact species row in the Florida Museum Lake Worth Lagoon checklist is marked verified, rather than merely listed as potentially occurring.

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

A dark double-peaked triangular mark above the gill cover is a useful first clue. Three rows of dark body marks include larger X-shaped marks low on the side. The pectoral base usually has a small upper dark spot, and two dark spots occur at the tail base. Its joined pelvic fins form a complete disc.

Size and life stages

The Smithsonian account gives a maximum length of about 8 cm (3.1 inches). Its reported depth envelope is 1–61 m. These are species-level limits, not the expected size and depth of every encounter. Use markings and proportions as well as apparent length; a photograph without a reliable scale cannot establish an exact measurement.

Habitat and where to look

Reef-associated sand, gravel and other soft-bottom patches are suitable habitat. Watch the border between solid reef and loose substrate, where a pale goby may rest almost motionless. Its small dark flank marks can look like grains or fragments in the background. The presence of suitable sand is a search clue, not proof that every goby there is bridled.

Range and local context

The documented regional range is Western Atlantic, including Florida and extending north and south of the tropical Caribbean. The exact species row in the Florida Museum Lake Worth Lagoon checklist is marked verified, rather than merely listed as potentially occurring. These records establish geographic occurrence, not abundance or a guaranteed encounter at a particular dive site.

What is on the menu?

The diet record includes bottom-living crustaceans, detritus and microalgae, with echinoderm material also listed. This is a bottom-feeding omnivore, not one of the specialist cleaner gobies. Tiny feeding movements may be more obvious than the food itself. A photograph of a bite cannot identify the prey unless the item is actually visible.

Daily habits and behavior

A pale body with irregular dark markings provides camouflage on mixed bottom. The fish’s posture and low position distinguish this sort of sand goby from a hovering school of masked gobies. The complete pelvic disc is an anatomical feature, not an invitation to detach or handle the fish. Identification should rely on the combination of head, shoulder and tail marks.

Mating and the next generation

The recorded eggs are benthic, and the larvae are pelagic. That arrangement links the sand-associated adult to an early stage in the water column. Species-level reproductive details should be used cautiously because older work on the bridled-goby complex can include fishes separated by later taxonomic study. This profile does not assign a local spawning calendar from those older generalized records.

Look-alikes and identification traps

The bridled-goby group includes several very similar species, so a casual brown-spotted goby photograph is not always sufficient. Colon goby has two pectoral-base spots rather than one upper spot, and lacks the double-peaked dark mark over the gill cover. Goldspot goby has a golden shoulder ocellus and a strong eye bar. Preserve detailed photographs for uncertain cases.

Observe without disturbing

Photograph the gill-cover region, pectoral base and tail base without blocking the fish’s escape route. Never stir up the sand to make it move or separate it from look-alikes. If the diagnostic marks are missing from the photograph, record Coryphopterus species rather than forcing a species name. This is a useful group in which to retain uncertainty.

Harvest, protection and eating safety

Restricted marine life: live collection only; no spearing

Can it be hunted or harvested?

Bridled Goby (Coryphopterus glaucofraenum) is regulated tropical ornamental marine life, not an unrestricted food-fishing species. FWC lists gobies, family Gobiidae. Where collection is lawful, a saltwater fishing license is required unless exempt. Land and keep the fish alive with circulating, aerated or oxygenated life support. Maximum permitted harvest size is 2 inches TOTAL length, not a minimum. Larger individuals must not be collected. Daily limit: five of this species within 20 marine-life organisms total per person. Two-day possession maximum: ten of this species within 40 organisms total. Recreational sale is prohibited.

Florida seasons and areas

No annual recreational closed months are listed for this marine-life species. Collection is prohibited within the designated Blue Heron Bridge dive-site boundary and throughout Biscayne National Park. Collection of these gobies and blennies is also prohibited in John Pennekamp Coral Reef State Park. Florida marine-life rules also apply in adjacent federal waters on both coasts. Check the exact park, refuge or sanctuary zone before collecting. The designated one-square-mile Western Dry Rocks area is closed to all fishing April 1–July 31 annually.

Can it be speared?

No. Spears are not authorized recreational gear for this regulated marine-life fish. Only lawful live-collection methods may be used, such as permitted hand-held, barrier or drop nets or a slurp gun. The live-landing requirement still applies.

Is it safe to eat?

Not recommended as a food target. This fish is regulated for live collection, and this guide does not certify it as safe to eat. Check Florida DOH guidance before consuming locally caught fish. Cooking does not remove all marine toxins. Small size, an absence of a specific advisory, and lawful collection do not establish food safety.

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 2026-11-10. Rules and advisories can change; check the linked authorities before harvesting or eating.

Sources and review

Reviewed 2026-11-10.

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