Masked Puffer (Ruppell, 1829)

 Scientific Name  Arothron diadematus
 Diet  Omnivore; lots of meaty food and algae based items.
 Alt Common Name  Panda Puffer
 Family  Tetraodontidae
 Origin  Indian and Pacific Oceans
 Aquarist Level  Intermediate
 Reef Safe  No
 Coloration  White and grey mottled with black markings
 Disposition  Peaceful unless provoked
 Hardiness  Moderate
 Compatibility  May fight with other puffers. Peaceful with other families. Should not be housed with fish small enough to fit in its mouth.
 Mature Size  12 inches
 Sexual Dimorphism  Not visible
 Venomous  Flesh is poisonous if eaten

Notes: Puffers are some of the most personable marine fish available today.  Many aquarists remark that they behave like dog.  They like attention and will eat from their owners hand.  Just be careful not to let them get your fingers.  Puffers do not have teeth, instead their jaw bones are fused together and are exposed.  These pseudo-teeth are very strong and quite sharp.

When puffers "puff up" it is a defense mechanism.  They want to look bigger so other fish will think twice about trying to eat or harass them.  Puffers should not be encouraged to display this response intentionally, because to "puff up" is a very stressful event.  If constantly repeated this can lead to health problems for the fish.  A puffer gulping for air at the surface is reason for concern.  Breathing above water can damage the internal controls for "puffing up" and can lead to health problems.  Floating food should be avoided because of this concern.