Sea Lions are monsters similar in nature to mermaids, in that their foreparts are those of a land animal (a lion in this case) while their hindparts are the tail of a fish. A sea lion is covered in scales from the neck rearward, even covering the leonine forelegs, but the manes of the males are as full and bushy as common lion’s might be.

The head of the sea lion is its weakest part, having an armor class of just 15, while the scaly body is tougher with an armor class of 17. In general, those attacking from the front may always strike at the head, while those attacking from the rear may not and those on either side may do so only if the player states such an intention.

Sea lions do not collect treasure as such, but they do usually drag the bodies of their prey back to their lair before eating them. This results in the treasure indicated collecting at random among the bones of their previous meals.