Mutation 1: Small areas of skin around the Spikes have ossified into tiny, mini-protoarmor bone plates (protoplacoderm) to re-enforce those areas for greater defense against potential predators, as well as for more complex social and mating behaviors. These tiny, mini-protoarmor skin-bone spike plates do not prevent the formation of pockets to store endosymbiont photosynthetic Algae, and does not really slow down the organism.
Movement: Move to Central Mangroves.