The aim of the game is to grow your fish population to the largest size it can, in the allotted time provided.
To move you fish, simply click on the destination you want the fish to go to.
To breed either click (in the right menu) 'self' or click 'out cross' and find a male.
Wheres my parent gone?
Once an adult gives birth the parent disappears. This does not affect your fish population, don't worry.
Why is it running slowly?
Try adjusting the graphics setting in the right menu to boost performance.
Why does my population number go down?
Randomly the game removes fish from your population, due to natural causes.