They have a spinnerets.
Their power: effect ray (p. 28).
In combat, they have the tactic manipulate but suffers from the weakness hands.
One last detail about this Rust monster: pulsing.
They have a mucus.
Their power: fire wall.
In combat, they have the tactic body slam but suffers from the weakness moonlight.
One last detail about this Eel: crystalline.