About
Its body is sealed inside a rigid shell of fused bony plates, so from the side it looks like a little box. Juveniles are bright yellow, dotted with black spots about the size of their pupils, which makes them look like tiny dice. As they grow, the yellow fades and the spots shrink, turning into pale dots ringed with black.
Because its shell keeps the body from bending, it gets around by fluttering its pectoral, dorsal and anal fins, puttering along in short hops. When stressed, it is known to release a toxic slime from its skin.
In Fish Around
It flutters its tiny fins, darting ahead in short bursts and stopping in between.