SKATES, RAYS and BONEY FISH
The teeth are short in height, recurved posteriorly, and increase in thickness towards the tooth base that is ovular in shape. The lingual surfaces are more convex than the labial surfaces. There are two distinctively strong cutting edges which may show faint serrations or crenulations. These teeth are small, ranging in size from a few mm up to 1 cm and require the use a fine meshed screen.
Fierstine HL, Walters V. 1968. Studies in locomotion and anatomy of scombroid fishes. Los Angeles: Anderson, Ritchie & Simon.