Which is not an aquatic animal?
Filaria
The correct option is D.
Explanation of correct option:
Explanation of incorrect options:
Option A:
Hydra is a freshwater organism that resides mostly in tropical and temperate regions.
Option B:
Jellyfishes are umbrella-shaped organisms found in the deep sea or oceans.
Option C:
Corals are invertebrate organisms that lie in the deep sea or ocean.
Final answer: Filaria is not an aquatic animal.