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Molly Miller

Scartella cristata

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Original side-profile illustration of Molly Miller (Scartella cristata); the best clue is the pair of rows of short cirri along the nape, often banded red and white.
Original identification illustration of Molly Miller. Features may vary.

Fun facts for your next surface interval

  • A molly miller on a Sargassum raft can be yellow instead of olive.
  • An empty barnacle shell can become a ready-made blenny apartment.
  • Its red-and-white nape tufts are separate fleshy cirri, not a single head crest.

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

The best clue is the pair of rows of short cirri along the nape, often banded red and white. The head has a steep front and additional cirri at the eyes and nostrils. Olive or dull-green fish show dark double bars, sometimes mixed with pearly spots. Two dark bars descend below the eye, and a dark blotch lies behind it.

Size and life stages

The Smithsonian account gives a maximum length of about 10 cm (3.9 inches). Its reported depth envelope is 0–20 m, usually shallower than 10 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

Tide pools, shallow rock and empty barnacle shells provide habitat. The species is also recorded on floating Sargassum rafts, so an encounter need not be on a coral reef. In shallow water, observe from a stable position without stepping on the rock community. An occupied barnacle can conceal nearly everything except the blenny’s head.

Range and local context

The documented regional range is Both sides of the Atlantic and the Mediterranean; western Atlantic from Florida to northern Brazil. 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?

This is an omnivore with an important plant-and-detritus component. Algae, organic debris and small invertebrates occur in the recorded diet. The mobile teeth lining its jaws suit a fish that picks at surfaces rather than swallowing large prey. Calling every bite “algae eating” would overlook the small crustaceans and mollusks included in its food record.

Daily habits and behavior

Molly millers are not always olive. Individuals associated with Sargassum can become yellow, while others are dark and strongly barred. Empty barnacles are among their recorded shelters. The tufted head may be the only part visible, making those nape cirri more useful than the full body pattern when the fish remains inside a small opening.

Mating and the next generation

Eggs are benthic and the larvae are pelagic, according to the species data report. The life cycle therefore connects a sheltered shallow-water adult to a dispersing water-column stage. No exact Palm Beach spawning period is established by the sources checked for this profile. Shelter occupation and color variation should not be interpreted as proof that eggs are present.

Look-alikes and identification traps

Seaweed blennies also have eye cirri and variable spotting, but lack the molly miller’s nape rows. A high fleshy crest is not the same structure as several separate cirri. Compare the head decorations, paired dark cheek bars and dorsal outline before using green color or a mottled body as the deciding feature.

Observe without disturbing

Do not remove the fish from a barnacle or expose a tide pool animal to air. Keep hands out of its refuge and avoid trampling the surrounding encrusting life. If it is on Sargassum, photograph the floating habitat without collecting it. Include the nape in the photograph so the red-and-white head tufts remain visible.

Harvest, protection and eating safety

Restricted marine life: live collection only; no spearing

Can it be hunted or harvested?

Molly Miller (Scartella cristata) is regulated tropical ornamental marine life, not an unrestricted food-fishing species. FWC lists blennies in family Blenniidae. 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. No species-specific recreational size limit is listed. 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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