What is a large sea animal related to the dolphin?

There are a few large sea animals related to the dolphin, depending on how specific you want to be:

Closely related (same family, Delphinidae):

* Orcas (Killer Whales): These are the largest members of the dolphin family, reaching up to 32 feet long. They are highly intelligent and social animals.

Distantly related (same order, Cetacea):

* Pilot Whales: These are large, robust dolphins, reaching up to 27 feet long. They are known for their social behavior and sometimes beach themselves.

* False Killer Whales: These are large, powerful dolphins, reaching up to 20 feet long. They are known for their sleek, black bodies and aggressive hunting tactics.

* Bottlenose Dolphins: While not as large as the others, they are still considered large for dolphins, reaching up to 12 feet long.

Other large sea animals:

* Whales (including Humpback Whales, Blue Whales, etc.): While whales are not technically dolphins, they are all cetaceans (the same order as dolphins) and share a common ancestor.

So, depending on how closely related you want the animal to be, you could choose from a variety of large sea animals related to the dolphin.