Nikt'oos out in the ocean seem to be more relaxed and will sometimes swim parallel to a sailing ship. Sailors believe that a major curse will befall anyone who kills such a nikt'oo. A properly trained female nikt'oo can be used as an amphibious beast of burden, capable of carrying goods in the water and on land. Wild nikt'oos who reach adulthood live for about 90 years, while domestic nikt'oos often live as long as 150 years. Female nikt'oos each lay 5d6 eggs every year, burying the eggs above the tide line on a warm beach.
Hatchlings are extremely vulnerable to disease, ecological contamination, and sea predators.
They will leave the water if the female is threatened while egg-laying. Out of water, they suffer a -2 penalty to hit and suffer 2 points of damage per round from the dryness. The male and female nikt'oos bellow to each other while the eggs are being laid, providing constant reassurance. Otherwise, the nikt'oos never make any vocal sounds. For the most part, nikt'oos subsist on jellyfish, molluscs, and seaweed.