Sea animals are animals that live primarily in the sea or ocean. From the given list, the sea animals are:
Whale: Whales are large marine mammals that live in the ocean. They are known for their size and unique adaptations for life underwater.
Seahorse: Seahorses are small marine fish that are found in shallow waters. They have a unique appearance, with a curved body and a long snout.
Shark: Sharks are a group of fish known for their cartilaginous skeletons and sharp teeth. They are apex predators in the marine ecosystem.
Dolphin: Dolphins are highly intelligent marine mammals that are known for their playful behavior and social structure. They are often seen swimming in groups or pods in the ocean.
Therefore, the sea animals from the given list are Whale, Seahorse, Shark, and Dolphin.