What do you think of whale men in fiction?

Are there any humanoid whale folk in fiction you like? Do you think it makes sense to have those in fiction? If you made a whale man species for a setting you made, how would you make them act?

Anyways, that guy in the picture is Thumpback from Skylanders Giants... I have two figures of him, but one is broken and doesn't work in the games unfortunately. He's a pretty cool character in the games to play as, his attacks feel powerful and I like how he can slide on his belly. Also he uses that anchor as his main weapon.

His backstory has him as a former pirate who liked fishing more than actually being a pirate, then he got separated from his crew which later were banished to a chest. Apparently he was part of the crew of The Phantom Tide ship captained by a sea dog named Frightbeard, who is the main antagonist of the 3DS game.