Saltcorner
By Bob Goemans
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Lactoria

Lactoria fornasini

(Bianconi, 1846)

Thornback Cowfish, Bluelined Cowfish

Not Reef Tank Suitable

Likely Fish-Only Tank Suitable

Range: Indo-West Pacific Ocean: East Africa eastward to the Hawaiian Islands, north to Southern Japan, and south to Lord Howe Island.

Size: 9 inches (23 cm)

Natural Environment: Inhabits outer lagoons and seaward reefs and usually found at depths between 20 – 100 feet (6 – 30 m) where it feeds on benthic invertebrates.

General Husbandry: Occasionally seen in the trade having a mottled tan to yellow body with blue spots and two long ‘horns’ on the head crest.

Best maintained in large fish-only aquariums having wide-open swimming areas and slow moving and very peaceful tankmates.

Requires a varied diet containing both meaty and vegetable matter, and should be fed several times daily.

Taxonomy:

    Order: Tetraodontiformes

    Suborder: Tetraodontoidei

    Family: Ostraciidae

    Genus: Lactoria

FYI: A slow moving fish, therefore, it should not be housed with fast moving and/or fin-nipping fishes.

Will eat snails and ornamental shrimp.

One per aquarium.

Do not offer floating foods, as this species may ingest air and cause buoyancy problems.

Should be the first fish placed in the aquarium.

May consume cyanobacteria/slime algae and other types of macro and microalgae.

May nip tubeworms.

When excited or threatened can release a toxin (ostracitoxin) that may kill other fish.

Activated carbon will remove the toxin, however, it may be too late to save it or its tankmates once it happens.

Always remove a specimen if it's being picked on or in bad health.

Experience Level: Expert

Temperament: Peaceful

Diet: Omnivore

Coral Safe: Yes

Fish Safe: Yes

Invertebrate Safe: With caution

Acclimation Time: 30 minutes+

Aquarium Environment: Fish-only aquarium

Tankmates: Peaceful

Minimum Tank Size: 100 gallons

Temperature Range: 72 - 79°F (22 – 26°C)

Specific Gravity: 1.020 - 1.026

pH: 8.0 - 8.5

 Lactoria fornasini (Thornback Cowfish, Bluelined Cowfish)
Photo © John Randall
Lactoria diaphana Ostracion cubicus
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