Panasonic DMC-TZ18 (underwater housing)
Photo taken in Tobago Cays/Caribbean
Ostraciidae is a family of squared, bony fish belonging to the order Tetraodontiformes, closely related to the pufferfishes and filefishes. Fish in the family are known variously as boxfishes, cofferfishes, cowfishes and trunkfishes. It contains about 24 extant species in seven extant genera. Members of this family occur in a variety of different colors, and are notable for the hexagonal or “honeycomb” patterns on their skin. They swim in a rowing manner. The hexagonal plate-like scales of these fish are fused together into a solid, triangular, box-like carapace, from which the fins, tail, eyes and mouth protrude. Because of these heavy armoured scales, Ostraciidae are limited to slow movements, but few other fish are able to eat the adults.