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.

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…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.

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The suit was ugly! Whale biologist.

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

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Stop him! He’s got aquarium property!

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