Controls

On PC your fish will follow your mouse, holding the left mouse button will make you boost. On Mobile the first tap to control your fish with the Joystick, second tap to boost. To stay still on PC, you can keep your mouse very near/on your fish to keep it still. Keep in mind you are actually more vulnerable this way, and can get easily stabbed.

Stabbing Fish
To stab a fish, you need to hit them with your weapon. They will be stabbed and you will get points. With each kill in a kill streak these points will increase. You can generally get fish in your radius by spinning around, but fish with longer weapons will be able to stab you without getting stabbed. Spinning is dangerous since the typical fastest spin is still very wide. Beware that attacking from the front will cause the fish with the longest weapon to win, or whoever has the better angle.