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Foureye Butterflyfish

Chaetodon capistratus

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Original identification illustration of Foureye Butterflyfish (Chaetodon capistratus), adult, viewed from the side.
Illustration for identification. Features may vary.

Fun facts for your next surface interval

  • Four eyes, only two eyeballs: the rear spots are markings, not extra vision.
  • Tiny armored beginnings: the tholichthys larva wears bony protection around its head.
  • Lost your partner? These fish may search for one another after becoming separated.

Florida and local context

Lake Worth Lagoon, Palm Beach County: Verified observation mark in Florida Museum regional fish checklist; no abundance or encounter guarantee inferred.

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 Foureye Butterflyfish wears a striking white-ringed black spot on each rear flank, creating the impression of an extra pair of eyes. Its real eye lies within a dark vertical head bar. Fine dark chevrons cross the pale cream body. The fish is a thin oval disk with a small pointed snout and rounded tail, not a miniature angelfish.

Size and life stages

Adults can reach about 15 cm, although Florida Museum reports many below 10 cm. Juveniles have additional bars and another eyespot associated with the dorsal fin, so the clean adult pattern is not universal. For a small fish, note exactly where each spot sits. A mark on the body is different from one on a fin.

Habitat and where to look

Adults use reefs; juveniles also occur in seagrass and mangrove habitat. The thin body allows close maneuvering around structure, but a diver should observe from outside those tight spaces. Check the edges of coral heads and nearby shelter without putting a hand down. Finding a juvenile in grass does not make it a different species from the reef adult.

Range and local context

Florida Museum's Lake Worth Lagoon inventory verifies this species, giving a specific Palm Beach County occurrence record. It also occurs widely in the tropical western Atlantic and Caribbean. The checklist is not an abundance survey or a forecast. A local record means it belongs in a regional guide, not that every suitable-looking reef will produce one.

What is on the menu?

Small attached invertebrates are important foods, including worms and colonial animals. The pointed mouth and fine teeth help reach and nip at feeding surfaces. It is not simply a colorful algae grazer. Watch where the mouth lands before interpreting a bite; the surrounding rock, coral and attached organisms can present several different foods within a tiny patch.

Daily habits and behavior

Adults are often paired, whereas youngsters may be solitary. Partners can seek one another after separation, but a brief encounter cannot prove a lifetime bond. During daylight, watch how the two fish keep contact while working around shelter. Their large rear eyespots are widely interpreted as deceptive markings that can misdirect a predator's attention away from the head.

Mating and the next generation

Pairs release pelagic eggs, and development includes the distinctive butterflyfish tholichthys larval stage. That stage has bony head armor, a surprising beginning for such a delicate-looking adult. Courtship and spawning are different observations from simply seeing two fish together. Describe only what you witness rather than treating a peaceful pair as evidence of active reproduction.

Look-alikes and identification traps

Banded Butterflyfish have strong adult body bars rather than the foureye's dominant rear flank ocellus. Spotfins place their namesake small spot at the upper rear dorsal corner. Juvenile butterflyfishes are more challenging because several combine bars with eyespots. Photograph the entire outline, including both dorsal and tail, before deciding which pattern fits.

Observe without disturbing

Keep the pair together and let each fish choose its distance. Do not reach into shelter or steer a fish toward open water for a clearer shot. A neutral hover protects the reef and allows natural feeding to resume. On a Stuart Scuba dive, ask for help comparing spot position and body markings while leaving the animals undisturbed.

Harvest, protection and eating safety

Restricted marine life: live collection only; spearing prohibited

Can it be hunted or harvested?

Foureye Butterflyfish is regulated ornamental marine life, not an ordinary food-fishing target. Recreational collection requires the appropriate saltwater license unless exempt, lawful marine-life gear, and landing and keeping the fish alive in adequately aerated or circulating water. Only fish from 1 to 4 inches total length may be retained. The daily limit is five of this species within 20 marine-life organisms total; the two-day possession limit is ten of this species within 40 total. Recreational sale is prohibited.

Florida seasons and areas

No species-specific recreational closed months are listed in the reviewed marine-life rules. This is not permission to collect anywhere: the designated Blue Heron Bridge dive site is closed to marine-life harvest. Florida marine-life rules also apply in adjacent federal waters. Check sanctuary zones, parks, refuges and current local closures before any collection.

Can it be speared?

Prohibited. FWC expressly includes butterflyfish among ornamental reef fishes that may not be harvested by spearing. Live ornamental collection is a separate, restricted activity, not an exception allowing a spear.

Is it safe to eat?

No species-specific Florida consumption-safety clearance was verified. Do not treat live-collection status as permission or evidence that this fish is safe to eat. Ciguatoxin cannot be removed by cooking or freezing. FDA/EPA mercury-based meal advice is not a ciguatera clearance for an individual reef fish.

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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