- egg case- is a casing that surrounds the fertilized eggs
- plankton- the small and microscopic organisms drifting or floating in the sea or fresh water, consisting chiefly of diatoms, protozoans, small crustaceans, and the eggs and larval stages of larger animals. Many animals are adapted to feed on plankton, especially by filtering the water.
- snout- the projecting nose and mouth of an animal, especially a mammal.