Fish Active during the day

Spotfin Butterflyfish

Chaetodon ocellatus

iNaturalist Wikipedia

A masterpiece of Caribbean color, the Spotfin Butterflyfish is easily identified by its sun-yellow fins and its clever 'decoy' eyespot. Often found in inseparable pairs, these reef beauties are a favorite for underwater wildlife watchers.

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Quick Identification

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Size

15-20 cm (6-8 inches) in length; typically under 0.2 kg (0.5 lbs)

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Colors

Brilliant white body, bright yellow dorsal, anal, and pelvic fins, with a black vertical bar through the eye.

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Key Features

Distinct black spot on the rear edge of the dorsal fin
Vertical black band masking the eye
Thin, disc-shaped white body
Yellow fins and tail
Pointed snout for reef foraging

When You’ll See Them

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Activity pattern Active during the day

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Peak hours 8 AM - 5 PM

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Season Year-round

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Diet Invertebrate specialist eating sea anemones, polychaete worms, and coral polyps

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Habitat Coral reefs, rocky jetties, seagrass beds, and dock pilings

Behavior

Spotfin Butterflyfish are highly social and are most famously known for their monogamous pair-bonding. They are almost always seen in pairs, working together to navigate the reef and defend their feeding territory. During the day, they are active and conspicuous, darting between coral heads and rocky outcroppings. They use their specialized snouts to pick small invertebrates and polyps out of tight crevices.

As diurnal creatures, they have a very different routine once the sun sets. At night, they lose their bright coloration, turning a duller gray to blend into the shadows, and seek refuge in deep reef crevices to avoid nocturnal predators like eels and sharks. Their interaction with humans is generally peaceful but shy; while they won't approach a person, they are often comfortable enough around stationary underwater cameras to be filmed in high detail.

photo_camera EverydayEarth exclusive

Camera Tips

For those with waterfront property or access to a dock, the Spotfin Butterflyfish is a fantastic subject for a submerged 'backyard' camera. To get the best results, mount your camera housing roughly 3 to 6 feet below the low-tide line on a piling that has significant growth of sponges or algae. These fish are naturally attracted to the organisms that grow on artificial structures, making dock pilings an ideal hunting ground for them.

Lighting is your biggest challenge underwater. Try to position the camera lens facing away from the direct sun to avoid 'lens flare' through the water, but ensure the area in front of the lens is well-lit by natural rays. Mid-morning is often the 'golden hour' for underwater photography in shallow water, as the light penetrates deep enough to make the fish's white body pop against the blue-green background without being too harsh.

To encourage a Spotfin to linger in front of your AI camera, you can use a scent-based lure. A small, weighted mesh bag filled with frozen brine shrimp or mysis shrimp attached just out of the frame will create a 'chum' effect that keeps them pecking in the area. Because they are fast and twitchy swimmers, use a fast shutter speed or a high frame rate setting (60fps or higher) to ensure your still captures aren't blurred by their rapid directional changes.

Similar Species

Species that look similar or are commonly confused with Spotfin Butterflyfish.

Foureye Butterflyfish

Has a large, prominent black spot on the body near the tail surrounded by a white ring, whereas the Spotfin's spot is small and located on the fin.

Banded Butterflyfish

Features broad, vertical black bars across the entire body rather than a solid white body with yellow fins.

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Frequently Asked Questions

Spotfin Butterflyfish are strictly diurnal, meaning they are active during the daylight hours. They are most frequently seen foraging between 8 AM and 5 PM, after which they find a safe crevice in the reef to sleep.

You can attract them by providing a food source such as a mesh 'suet' bag filled with frozen seafood or by ensuring your dock pilings have a healthy growth of algae and sponges. They are curious fish that will investigate new structures in their territory.

They are carnivores that specialize in eating small invertebrates. Their diet includes polychaete worms, sea anemones, coral polyps, and occasionally small crustaceans found in the reef substrate.

Yes, they are very common throughout Florida, especially in the Florida Keys and along the Atlantic coast. They are frequently spotted by snorkelers and divers around jetties and coral reefs.

The easiest way is the location of the spot. The Spotfin has a small black spot on the back edge of its yellow dorsal fin, while the Foureye Butterflyfish has a much larger, ringed black spot on the side of its body near the tail.

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