How is a fish embryo protected?

Fish embryos are protected in a variety of ways, depending on the species. Some of the most common protective mechanisms include:

Egg shells: Many fish species lay eggs that are encased in a hard shell. This shell helps to protect the embryo from physical damage and from predators.

Jelly coats: Some fish species produce a jelly-like substance that coats their eggs. This jelly coat helps to protect the eggs from dehydration and from attack by bacteria and fungi.

Nestbuilding: Some fish species build nests to protect their eggs. These nests may be made of plant material, rocks, or even the bodies of the adult fish.

Parental care: In some fish species, the parents provide care for the eggs and the newly hatched fry. This care may include guarding the eggs and fry from predators, fanning the eggs to keep them oxygenated, and providing food.

These are just a few of the many ways that fish embryos are protected. The specific protective mechanisms that a fish species uses will depend on its environment and its evolutionary history.