Circle, triangle, and square. They’re simple, geometric, and eerily familiar. They look like something pulled straight out of a PlayStation controller or a childhood game of tic-tac-toe.

The fish or stingrays entered an experimental arena where they saw a test stimulus: a card showing a set of geometric shapes (square, circle, triangle) in either yellow or blue. In a separate ...

The Coral Triangle has more coral reef fish diversity than anywhere else in the world: 37% (2,228) of the world’s coral reef fish species (6,000), and 56% of the coral reef fishes in the Indo-Pacific ...