Planarian and Seed Shrimp Attack Snail Eggs

Here you can see a planaria next to a jelly blob filled with snail eggs.

 Planarian are carnivorous flat worm creatures.

Planarian: "effectively immortal" science model for regeneration and aging research

I found planaria in a pond of Central park, NY.

What creature is this?

I found this creature in a sample of water and duckweed collected at a pond of the Central park of NY.