Find the Connection

I am made of milk. You keep me in the fridge.

I am cold and you like to eat me in the summer.

Who am I?

I eat insects. I live in the pond.

I hop. I am green.

Who I am?

What comes once in a minute, twice in a moment, but never in a thousand.

What am I?

I don't have legs. I don't have arms.

I don't have ears. I live in the water.

I can swim well.

Who I am?

I am the second planet from the sun.

I spin the opposite direction as Earth.

who am I?