Larger ones might bite electric cables and devices, even glas heaters.
Might release a very toxic poisen into the water when he is stressed. Dead animals should be taken out immediatly for the same reason.
Ostracion cubicusis commonly referred to as Blue-spotted Box-fish, Cubed Boxfish, Cubical Boxfish, Polka Dot Boxfish, Yellow Box-fish, Yellow Trunkfish. Difficulty in the aquarium: Only for advanced aquarists. A aquarium size of at least 2500 Liter is recommended. Toxicity: Toxic.
Ostracion cubicus is (very) poisonous and the poison can kill you under circumstances!!!
If you want to keep Ostracion cubicus, inform yourself about the poison and its effects before buying. Keep a note with the telephone number of the poison emergency call and all necessary information about the animal next to your aquarium so that you can be helped quickly in an emergency.
The telephone numbers of the poison emergency call can be found here:
Overview Worldwide: eapcct.org
This message appears for poisonous, very poisonous and also animals whose poison can kill you immediately. Every human reacts differently to poisons. Please therefore weigh the risk for yourself AND your environment very carefully, and never act lightly!