China Naming Network - Eight-character lottery - What are the names of these microorganisms?

What are the names of these microorganisms?

Microorganism (1)

Shell worm

Microorganism (2) Carotenoid pig

Microorganisms (3) and (4)

It's the same kind. I can't see the details clearly

Probably rotifers, eating.

The green one is a rotifer.

There are two tails and tentacles on the head; water flea

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