Synacodurus purlaglowus
They evolved from S. kelpcetus that became nocturnal due to predation in the day. Their tail extended with their tail fin fusing into one tail to steer and now propel itself even faster. Due to their secretive nature at night they developed bioluminescence which evolved as a dominant mutation due to their feed habits of N. protos which created the purple bioluminescence on their fins. They also developed eyes that are better seen in the dark able to barely tell what is a predator or food
Found in zone 25 they are usually found in the deepest depths of zone 25. They use their bioluminescence to see each other in the dark. They feed on C. certia, N. protos, K. submergus, F. foliumegaeus, K. anchorus and S. podius. They found in groups of 2-4 and grow up to 50cm(to avoid predation). During the night they will reach to surface area to feed. Once dawn is up they will return back down to the depths. If they are very hungry they would still reach to the surface to feed at day but would swim back down as fast as they can.They molt their primitive chitin every 2 months on their backs. The species rest in the currents usually going with the flow. They use their 2 fingered limbs to grip on to mates when mating more effectively.
When breeding males now flare at females using their bioluminescence purple(females are attracted to brighter colours) and tries to attract females. Females judge by the intensity of the colour and males want to show that the male have a better system to find each other and now get separated from its group and therefore signaling that they have good genes. Mating occurs when many groups up to 2-4 groups come and mate with each other which they return back to their groups after mating. Once the female accepts the male, the male would mate with the female using its front limbs to grab the female as it mates. Once they are mated the male would not show any care for the female and leaves her.The female will be pregnant and the gestate its egg in its womb which would take 1-2 months.
The female would then give birth to 9-14 larvae however only 2-4 survive.The female will take care of her young as other groups (not her own) will try to eat her young as the young have soft shelled (when they are born )and are easily eaten by other groups of their own kind. After 2 months they will molt their shell will harden but still live with its mother for the next 2 months which it would then join the group and live in the group.
