Ostracion cyanurus
Source: JJPhoto.dk

Facts

Latin name Ostracion cyanurus - Rüppell, 1828
Common name Bluetail trunkfish
Family Ostraciidae - Ostracion
Origin East Indian Ocean, The Red Sea
Max length 15.0 cm (5.9")

As aquarium fish

Minimum volume 600 l (158 gal)
Hardiness Average
Suitable for aquarium Suitable with care
Reef safe Not reef safe
Aggressiveness Unknown

Food

Mostly
  • Other invertebrates
  • Soft coral
  • Large polyp stone coral (LPS)
Recommended
  • Macroalgea (Eg. seaweed / nori)
  • Small crustaceans (Krill, mysis, artemia...)
  • Larger crustaceans (Shrimp, crabs...)
  • Fish

Poisonous skin.

This species has a toxin in its skin, which it releases when highly stressed or dying.

This poison can kill all the aquatic life in the aquarium, if unlucky.

Threat towards invertebrates

This species likes eating crustaceans, small bivalves and the like.

Eats tubeworms

This species likes to eat tubeworms.

Insufficient information

There is little available knowledge of this species, so there can be important information missing on this page.

Poor maneuverability

This species cannot maneuver in strong currents, especially so when small.

Pay particular attention to the pump’s water inlet as these fish in certain circumstances, can get stuck.

Personality

This species often has a fun and interesting personality.

Description

Does not eat whole fish, but a good diet consists of a mix of vegetables, pieces of shrimp and small pieces of fish.

Family description (Ostraciidae)

Boxfish(Ostraciidae) have a unique square shape and a particular way of swimming.
They have a rather special personality, which one quickly comes to love.

Boxfish live typically off a mixture of algae, coral polyps, zooplankton, and in some cases crustaceans.
They are not normally reef safe and when small will require gentle water circulation.

Boxfish can secrete a poison when stressed or if they die, which can in the worst case, kill the contents of a whole aquarium.
Never use the water the fish was transported in.

FishBase

Aquarium trade Rarely
Distribution Western Indian Ocean: Red Sea to the Persian Gulf.
English common names Bluetail trunkfish
Danish common names Blåhalet kuffertfisk

References and further reading

About references

Bob Fenner. The Puffers Called Box-, Cowfishes, family Ostraciidae - Wet Web Media - (English)
Richard Aspinall. 2012. Oddballs for the Marine Aquarium - Tropical Fish Hobbyist - (English)

Froese, R. and D. Pauly. Editors. 2014. FishBase. World Wide Web electronic publication. www.fishbase.org, version (08/2014).

Tags

eats shrimp, eats crab, eats bivalve clams mussels scallops, eats feather duster worm
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