Lantern Toby Pufferfish

Snapshot: A small puffer with a pale belly and striking yellow and blue eye lines. It also sports blue spots, and a yellow pectoral spot.
 
Other tidbits: Can grow up to 12cm or so. Range extends from Australia's Christmas Island in the eastern Indian Ocean and the northern Great Barrier Reef, to the Hawaiian and Society Islands.
 
Bare bones must know: Live-rock fish-only system, or fish-only system. Top-notch filtration to cope with messy eating habits. Use a container, not a net, for transfer to prevent stress. Handle with extreme care, its defense mechanism, tetrodotoxin, is lethal. When threatened or when it dies, it releases a toxin deadly to other tank mates. Best kept in its own aquarium.