these guys are spawned on land near water, they do not float so they will not attack you if they happen to stumble into the water (L.O.S. limitation*)
default: true
these guys are spawned in shallow water, they float so they will follow you onto land to take a bite out of you
default: true
these guys are spawned in shallow water, they do not float so they will only attack if you attack first (L.O.S. limitation*)
default: true
Mobs not attacking while underwater is a limitation of the MineTest LineOfSight function used in the "mobs_redo" mod to check if there is anything to attack. Seems that mobs can't see through water.