Interpretation: fish seedlings; The early life history of fry and fish can be divided into embryonic stage, larval stage and juvenile stage, and its nutrition includes endogenous, exogenous and mixed types.

Example: The variation of runoff in the Yangtze River has a certain influence on the quantity and distribution of fish eggs and larvae.

With the development of metamorphosis, the skin structure of turbot larvae with and without eyes is different.

Adding vitamin C to the feed can increase the accumulation of vitamin C in the larvae of Sparus macrocephalus.

There are two enlarged and sharp spines in the lower corner of the posterior margin of the anterior branchial operculum, which is one of the signs to distinguish the larvae of yellow snapper.

The feeding of early larvae of mudskipper was analyzed under the condition of raising seedlings in soil pond.

After 23 days of age, the small intestine forms abundant villi.