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the immature free-living form of most invertebrates and amphibians and fish which at hatching from the egg is fundamentally unlike its parent and must metamorphose
Larva is an intermediate form that an organism goes through to reach adult form.
EX: --> tadpoles are larval of frogs
--> caterpillars are larval of butterflies or moths
There is no such thing as an "adult larva" , a larva is always immature ( a "baby"). If you mean "how is a sponge larva different from and adult sponge?" The answer is: 1. The larva is almost...