Thorned Nautstar
This nautstar has attained many features for survival among the nutrient-rich coasts. Their green coloration helps them hide under Matleaf and near other green flora like crystalmats, and their tough thorns deter predators effectively. Their arm lobes are even stronger and longer, providing a decent surface area to push away water. When provoked, they will rapidly dart away from predators. They are mostly nocturnal, and will partially bury themselves under sand at daytime. Their eyes have moved further up the arm, giving it a very good view of predators. The main drawback is that they must sit still to get a good picture of the environment. Similarly to the horn nautstar, they reproduce rapidly and are quite common.