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February 10, 2012
Marine Fish
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Helmet Cowfish
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Helmet Cowfish
Veterinary & Aquatic Services Department, Drs. Foster & Smith, Inc.

Referred to by many names, including Camel Cowfish, Thornback, Thornbacked Boxfish, Cowfish Helmet, and Hovercraft Boxfish, the Helmet Cowfish requires the care of an experienced aquarist. The Helmet Cowfish has a rather drab, pale tan body with random blotches of blue and occasional black dots. The eyes are large and blue.

The Helmet Cowfish should have a minimum of an 70-gallon tank. Use caution if placing it in a reef tank as it will often nibble at tubeworms. When stressed, the Helmet Cowfish releases a poisonous substance, called ostracitoxin, from its mucous glands which will kill other fish in the tank very quickly.

Very little success has been achieved in breeding this fish in an aquarium.

When introduced into a tank, the Helmet Cowfish can be fed a diet of live brine shrimp or bloodworms. After acclimatization, chopped squid, clams, mussels, and herbivore preparations can be fed. This fish has the peculiar habit of coming to the surface and spitting when it is hungry.

Fish Facts
Name: Helmet Cowfish (Tetrosomus gibbosus)
Family: Ostraciidae
Range: Indo-Pacific
Size: Up to 4 inches
Diet: Omnivore
Tank Set-up: Marine: Coral or rock, plants
Reef Compatible: With caution
Tank Conditions: 72-78°F; sg 1.020-1.025; pH 8.1-8.4
Minimum Tank Capacity: 70 gallon
Light: Medium
Temperament: Peaceful
Venomous: Yes
Swimming Level: No specific level
Care Level: Difficult
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Picture(s): Courtesy of Drs. Foster and Smith |
Information provided courtesy of PetEducation.com

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