Plankton consists of any drifting organisms (animals,plants,archaea or bacteria) that inhabit the pelagic zone of oceans, seas or other bodies of fresh water. They provide a crucial source of food, to more familiar aquatic organisms such as fish.
See related link below...
single unicellular creature
It eats plankton.
plankton
One invertebrate sea creature that eats them is the Octopus. A mammalian creature that eats them is the Sea Otter.
Plankton is real because if you check in a book a plankton is a real live sea creature
The fish, including plankton.
whale but if your talking about phytoplankton every creature under the sea eats it! whale but tones eat it even though they dont like it it just to small
the leafy sea dragon eats shrimp, small fish, and plankton.
Sea wasps are the main diet of flying fish.
It is a living sea creature, specifically plankton consisting of microscopic plants.
Waterfowl
A sperm whale.