It is Long

I am the second planet from the sun.

I spin the opposite direction as Earth.

who am I?

I eat insects. I live in the pond.

I hop. I am green.

Who I am?

 I have branches, but no fruit, trunk or leaves.

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 nearest planet to the sun.

I am the smallest planet in the solar system.

Who am I?