Most fish like to keep their eggs in their mouths, actually to protect them. Although fish have a strong reproductive ability, they lay a large number of eggs every time, but because they may be persecuted by natural enemies at any time in the water, they may also be hit by wind and waves, so many fish eggs may have become food for other fish before they have a chance to hatch, so fish like to keep them in their mouths, mainly to ensure the survival rate of fish eggs.

In fact, it is not easy for parents to hatch fish eggs, because fish eggs are easily invaded by foreign enemies. Although there are a lot of fish when laying eggs, not many can survive smoothly, so it is safer to contain them in your mouth. Moreover, when the female fish lays eggs, the male fish will put the eggs in his mouth. Although during this period, the male occasionally spits out the eggs and cleans them, breathing oxygen, but most of the time the male's mouth is full.

Sometimes the female fish lays too many eggs and the egg pieces are too big, so the male fish can't close the eggs after putting them in his mouth, and when hatching the eggs, the male fish can't eat any more and has to be hungry. Until all the eggs hatch into small fish, and these fish can find their own food, the male fish will remember to feed himself, so the fish father took pains to protect his children.

In fact, the role of fish eggs in the mouth can not only protect the fish better, but also hatch the fish better. Male fish can provide more nutrition and a more comfortable hatching environment for fish eggs. Male fish can provide the nutrition and environment needed for the hatching of fish eggs, which can make the eggs hatch faster, and even if there is enemy damage, the fish father's ability to avoid will definitely be stronger. Fish eggs have no self-protection ability in nature, but they still depend on the ability of fish father.