Goldfish
The tuna is a carnivore. It must eat to survive, and it eats other fish because it cannot eat plants.
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.
star fish do not use its stomach to eat.
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.
Seals eat fish.
The smaller fish eat moss and algae off the rocks to survive, while the bigger fish eat the smaller fish to survive.
eat algae
Blob fish survive by laying on the bottom of the ocean floor and eat anything that floats by!
the need fish to survive
They eat fish and small animals.
so we can have water and we need to survive and also eat fish
they eat fish and drink water to survive