According to legend, packets of rice were thrown into the river to prevent fish from eating the poet's body.

However, the dam and weir system still prevented fish from using the full length of the river.

For utilities, the preferred solution would be a system that prevents fish from being drawn into intake pipes.

And what prevents fish from being electrocuted when lightning strikes?

The central concern of fish processing is to prevent fish from deteriorating.

Males become extremely territorial during spawning, and will prevent other fish from approaching the nest.

It is long enough to assure adequate flow of water and prevent fish from escaping the net, after having been caught.

It has sharp, gripping hooks to prevent fish from escaping.

This prevents frozen fish whose legality has not been confirmed from being landed at European ports.

Sometimes, these sharks will grab onto their tail with their mouth in a ring shape to prevent other fish to attack.