There's a lot of Lord of the Rings influence here.
Hulking claw guy.
Angry bug.
Spiky fish, thorny plant, or both.
Whale riding a bicycle (not a monster, perhaps, but kind of a scary idea).
I drew this caveman during a discussion of critical legal theory.
Tragic monster.
Sharkvark!
Some sort of insect nobleman.
Hamburger monster.
Crim Pro Alien.
I'm almost sure this was inspired by the goblins in The Hobbit.
Orc?
Angular dragon.
Ghost or demon or something with another orc-looking thing.