the pipe fish has no teeth so it has to eat its food whole. its mouth is too small to eat anything but brine shrimp or krill. :)
Do you mean "does not eat"? It depends on the species. Some fish, like the lungfish, may not eat for months, but can easily survive.
little creatures from whales
Seals eat fish.
eat algae
The smaller fish eat moss and algae off the rocks to survive, while the bigger fish eat the smaller fish to survive.
Blob fish survive by laying on the bottom of the ocean floor and eat anything that floats by!
the need fish to survive
The tuna is a carnivore. It must eat to survive, and it eats other fish because it cannot eat plants.
They eat fish and small animals.
Goldfish
Many fish are carnivores, which means they eat other animals. They attempt to survive, and to live, they must eat. Many larger fish eat smaller fish as a part of their diet.
they eat fish and drink water to survive