Saltcorner
By Bob Goemans
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Sargocentron

Sargocentron microstoma

(Gunther, 1859)

Fineline Squirrelfish, Smallmouth Squirrelfish

Likely Reef Tank Suitable

Likely Fish-Only Tank Suitable

Range: Indo-West Pacific Ocean: Chagos and Maldives to Hawaiian, Line, and Tuamotu Islands, north to Southern Japan, and south to Austral Island.

Size: 8 inches (20 cm)

Natural Environment: Inhabits crevices and holes in a wide variety of reef environments and can usually be found at depths between 3 - 100 feet (1 - 30 m) during daylight hours, and feeds at night mainly on crabs, shrimp and small fishes.

General Husbandry: Uncommon in the trade, having a dark reddish body with white horizonal lines.

Best maintained in aquariums with several caves/hiding areas large enough to house the adult-sized specimen, as those in this family grow to adulthood quite fast. The aquarium should also be dimly lit, as this is a nocturnal species, preferring to hide throughout daytime hours and feed at night. If maintained in a brightly lit aquarium, i.e., reef aquarium, it should also have sufficient caves as noted above, but will be far less visible in daylight hours. Tankmates must be large enough not to be eaten, as they will also consume smaller fishes.

Requires a meaty diet such as enriched chopped fish or shrimp flesh, mysis, frozen brine shrimp, and/or frozen carnivore foods with one or two feedings per day.

May be difficult to feed in the early days in the aquarium due to its nocturnal feeding habits, and if so, live foods, e.g., live enriched brine shrimp, grass shrimp, black worms (Lumbriculus variegatus), baby mollies and/or guppies should be offered. Over time, it will learn to accept frozen foods like mysis, krill and brine shrimp more readily when offered to others in the aquarium.

Taxonomy:

    Order: Beryciformes

    Suborder: Holocentroidei

    Family: Holocentridae

    Genus: Sargocentron

FYI: Will eat ornamental shrimp.

Sensitive to tapping on aquarium side panels.

Has spines on their head and gills, which can come entangled in nets and also a large preopercular spine, which can inflict a wound if mishandled by the aquarist.

Experience Level: Intermediate

Temperament: Peaceful

Diet: Carnivore

Coral Safe: Yes

Fish Safe: With caution

Invertebrate Safe: With caution

Acclimation Time: 30 minutes+

Aquarium Environment: Reef or fish only aquarium

Tankmates: Peaceful

Minimum Tank Size: 75 gallons

Temperature Range: 72 - 80°F (22 – 27°C)

Specific Gravity: 1.020 - 1.026

pH: 8.0 - 8.5

 Sargocentron microstoma (Fineline Squirrelfish, Smallmouth Squirrelfish)
Photo © John Randall
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