Bonefish Diplomystus humilis Eocene USA 2

BONE FISHES have several characteristics that distinguish them from cartilaginous ones, such as the presence of a bony endoskeleton, flexible scales, respiration through gills and a swim bladder. BONE FISH are the largest group (corresponding to 9 out of 10 species) and diverse of current fish. These animals inhabit all types of water, fresh, brackish, salt, hot or cold (although most are limited to temperatures between 9 and 11ºC). They have adapted to live in sometimes difficult conditions, such as high-altitude lakes, polar zones, hydrothermal vents, ponds with high salinity or poor in oxygen, etc. DIPLOMYSTUS is an extinct genus of freshwater fish, and they are distantly related to herring and sardines.