Diodon holocanthus (spiny puffer)

Growing to 30 cm (11.8") this fish needs a moderately large tank (284 liter / 75 gallons). It is aggressive against members of its own species as well as other species. Should be fed meaty meals (fish, squid, shrimp, mussels or krill). If there is no algae in the tank, green stuff should be added. Ideally the fish should be fed no less than 3 times per day. The fish is primarily nocturnal and may hide all day until fully acclimatized. It is a comical pet like fish by it may also bite hands - a painful experience. You should not provoke inflating since it may take air which is extremely difficult to be removed and may become lethal. Netting it is also discouraged as it may inflate in the net which makes removing it very difficult. 

Photo: Mike Iannibeli