Tadrolls are large tadpoles with no eyes, orange heads, and they have a blue tail and underbelly. In their egg form, the egg itself is yellow.
Jason encounters Tadrolls in Area 4's dungeons, with most of them being in egg form. If these eggs are shot at or approached, they will quickly hatch into Tadrolls, which will bounce around, trying to damage Jason via contact.
Tadroll eggs can also wash up on the floor after a wave of water passes; this can happen an unlimited number of times.