Tap the fish i fishig mode.
Tap the area i Catch Fish mode

Tiny Fishing is a fun and addictive 2D puzzle fishing simulation game that challenges your skills. Enjoy this charming game as you explore a fishing adventure. The game has two modes: Fishing and Trawling. In Fishing mode, you cast your line by clicking on each fish’s body and catch them quickly to advance to the next level. In Trawling mode, you release the net by clicking on the desired area and capture everything within it. You also have to complete the objective fast.

For iOS:
Safari on iOS 8 and later supports WebGL 1.0, and on iOS 15 and later supports WebGL 2.0.

For Android：
Nearly all of them support WebGL