Saltcorner
By Bob Goemans
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Grammistes

Grammistes sexlineatus

(Thunberg, 1792)

Sixline Soapfish

Not Reef Tank Suitable

Likely Fish-Only Tank Suitable

Range: Indo-West Pacific Ocean: Red Sea to the Marquesan and Mangareva Islands, north to Southern Japan and south to New Zealand.

Size: 11 inches (28 cm)

Natural Environment: Inhabits caves and crevices on coastal reefs and is usually found at depths between 3 – 65 feet (1 – 20 m) where it feeds at night on small fishes.

General Husbandry: Rarely seen in the trade, having a dark brown body with whitish yellow horizontal lines/bands.

Best maintained in fish-only aquariums with several hiding places such as caves and ledges, as this is a secretive species. Will spend the majority of its time in hiding, and only leave these areas to feed, then return to its hiding area where it will continue to mostly stay in the darker areas of the aquarium. Not aggressive, except to tankmates that can be swallowed.

As to diet, difficult to feed anything but live foods, therefore small live marine fish, live glass/grass shrimp and/or small crabs, e.g., fiddler crabs, may be needed to sustain this species.

Nevertheless, products such as finely chopped marine fish and crustacean flesh, clams, and other marine meaty foods can be offered occasionally to try and switch it to other than live foods. Should be fed at least once per day.

Taxonomy:

    Order: Perciformes

    Suborder: Percoidei

    Family: Serranidae

    Subfamily: Grammistinae

    Genus: Grammistes

FYI: Not safe with smaller fishes, small crabs, or small ornamental crustaceans.

As with all soapfish, if stressed, may release a toxic substance (grammistin) from the skin that could kill it and all tankmates.

Prevent any stressful conditions in the tank!

Brightly lit reef aquariums are not recommended for this species, as that can be a stressful environment.

Experience Level: Intermediate

Temperament: Semi-aggressive (will eat smaller fish and crustaceans)

Diet: Carnivore

Coral Safe: Yes

Fish Safe: With caution

Invertebrate Safe: With caution

Acclimation Time: 30 minutes+

Aquarium Environment: Fish-only aquarium

Tankmates: Peaceful to moderately aggressive

Minimum Tank Size: 75+ gallons

Temperature Range: 72 - 81°F (22 – 27°C)

Specific Gravity: 1.020 - 1.026

pH: 8.0 - 8.5

 Grammistes sexlineatus (Sixline Soapfish)
Photo © Bob Fenner
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