The whale biologist is one of the best one off characters:

Well, you’ve come to the right guy. I’m the whale biologist, though personally I hate whales. Especially Mushu

Then why’d you become a whale biologist?

I don’t know you well enough to get into that.

…and the fifth reason whales kill is for the sheer fun of it!

Anything else?

Yeah, your suit’s lumpy and you smell awful. Hey, I call ‘em like I see ‘em, I’m a whale biologist.

The suit was ugly! Whale biologist.

Introducing Mushu! The educated whale who thinks he’s better than you!

Stop him! He’s got aquarium property!

Better do what he says; he’s a whale biologist.