Physiology
Seresans are long, about 8 to 10 feet long (about half torso/head and tail/fins tho many ratios exist). There are fewer males than females in the population. Most adult Seresans have an athletic build due to the hostile environment they live in (they do a lot of fighting). Females have small to no visible breasts. Male and females have no nipples. Seresans are direct descendants of Ambrivans, and have similar anatomy for their head and torso. They all have a sac that functions for breeding and egg hatching in their tails.
Seresans have long needle-like nails on their fingers and thumbs and no nostrils. They breathe through gills in their abdomen as they move through the water. They are telepathic creatures and use their mouth only for eating and fighting (they can speak to any intelligent creature telepathically and can hear spoken language just fine). Seresans age fast to adulthood. When born, they grow quickly, and within a single year are considered adults. Seresans can live to the age of about 100, but because of their hostile environment, they often only make it to between 50 and 80 years old.
Seresans are elegant and graceful in the water, but they cannot exist on land or in the air. Their hide is thick with small scales covering every surface of their body. They like enclosed spaces for safety and often have anxiety about going into open waters or too near the surface (tho many do travel in open waters and to the surface for various reasons). Seresans excrete waste from the ends of their tails. They consume a diet of fish and sea grasses.
Love, Relationships, & Reproduction
Seresans are not known for their monogamy, and will mate with anyone in their community freely. Males take on the responsibility of nurturing eggs for the month it takes them to develop and hatch while the females defend the community. While all Seresans have the nursery sac, males have a larger sac and will hold the offspring of many different Seresans and nurture them as their own. The community gets together when they are ready to hatch and protects the hatchlings together until they are mature adults.
Seresans breed by females first dropping eggs into their nursery sac. Eggs can stay their for up to 3 days before they die off. Females use this time to find the right male to transfer their eggs to at which time the male, when his nursery sac is full, will fertilize the eggs of multiple females. Sometimes males and females are born with both sets of sexual organs. When this happens, they cannot fertilize their own eggs. And sometimes females want to carry their own eggs to birth. To do so, they must find another with the ability to fertilize them within the 3 day timeframe. This can be hard to do as tradition is held on high in Seresan society, so breaking the tradition of the male hatching the eggs is frowned upon.
Outside of reproduction and "love," Seresans are rather standoffish. They know they won't live long in this hostile environment, so they keep their allies much closer than their friends and acquaintances. Should a Seresan balk at tradition or turn on their people, they are shunned from soceity (basically a death sentence to live alone in the ocean).