Saltcorner
By Bob Goemans
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Chaetodon

Chaetodon sedentarius

Poey, 1860

Atlantic Butterflyfish, Reef Butterflyfish

Likely Reef Tank Suitable

Likely Fish-Only Tank Suitable

Range: Western Atlantic Ocean: North Carolina south the Gulf of Mexico, west to the Bahamas and south to Brazil.

Size: 6 inches (15 cm)

Natural Environment: Inhabits shallow coastal sponge and coralline encrusted reefs at depths of 15 – 250 feet (5 – 75 m) and natural diet consists of polychaete worms, small crustaceans, amphipods and hydroids.

General Husbandry: Quite pretty as it has silvery-white body highlighed with a black eye band, black on the caudal peduncle, and yellow dorsal, anal, and tail fins. Very hardy and easy to feed, and if there is a species in this genus that is to some major extent reef safe, this is it!

Best maintained in larger peaceful fish-only aquariums, especially those with lots of open swimming space, live rock hiding places, and having some micro and macroalgae growths. As to diet, a meaty diet of live fortified brine shrimp and/or black worms (Lumbriculus variegatus) is a good beginning. Once feeding regularly, various frozen meaty foods such as mysis, can be offered several times daily. Flake foods, especially those containing Spirulina and/or Nori should also be occasionally offered.

Even though known for feeding immediately upon entering the aquarium, should there be a problem getting this species to feed, small human consumption clams/black mussels purchased in local grocery stores and placed on the half-shell in the aquarium may help entice it to begin feeding. Over time, frozen foods like mysis and brine shrimp may be more readily accepted.

Taxonomy:

    Order: Perciformes

    Suborder: Percoidei

    Family: Chaetodontidae

    Genus: Chaetodon

FYI: Can be maintained with others in the same genus or with others from other butterflyfish genera, yet all should be added at the same time.

Juveniles acclimate more easily to aquarium life than do adults.

Pressing some soft foods into openings/crevices on a piece of old dead coral skeleton can sometimes encourage finicky eaters to begin feeding.

Experience Level: Beginner

Temperament: Peaceful

Diet: Omnivore

Coral Safe: Yes

Invertebrate Safe: With caution

Acclimation Time: 30 minutes+

Aquarium Environment: Fish-only aquarium

Tankmates: Peaceful or non-aggressive

Minimum Tank Size: 75 gallons

Temperature Range: 68 - 82°F (20 – 28°C)

Specific Gravity: 1.020 -1.026

pH: 8.0 - 8.5

 Chaetodon sedentarius (Atlantic Butterflyfish, Reef Butterflyfish)
Photo © Bob Fenner
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