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The Jeth'vul are piscine sophonts who originated from the freezing waters near the Isle of Ix. A thick layer of blubber is present underneath their skin, allowing them to resist the cold temperatures of southern Talveria. All Jeth'vul are female, though only members of the reproductive caste are capable of laying eggs. The other two castes are the workers and warriors, the former are a generalist caste which is capable of filling many roles in a colony, while the latter exist to hunt and defend the rest of the colony. Most Jeth'vul do not leave their colony, though those who do leave typically do so when the colony is experiencing little-to-no struggle. This is the reason most people living on the Talverian mainland rarely see Jeth'vul. Diet not only varies based on caste, but is also what determines the caste a Jeth'vul will grow up to be; a diet of exclusively meat creates a warrior, a combined diet of plants and meat results in a worker, and a diet consisting of a mixture of meat and the gel-bladders of the Ghu'tak kelp will result in a reproducer.
Jeth'vul communication is poorly understood, while some colonies do have spoken languages, Jeth'vul mainly communicate through bioelectric signals that cannot be detected by most other sophonts. These signals not only allow them to communicate with each other while underwater, it also allows them to sense their environment without ever needing to use their eyes. This field of electricity becomes more powerful and will cover more range in larger groups of Jeth'vul. As this field doesn't function outside of water, many can end up feeling disoriented or exposed, especially if this is their first time on land. Most Jeth'vul have poor eyesight, though land-dwelling individuals may wear specially made eyeglasses in order to correct this. Seadwelling Jeth'vul have no need for them, as they rely on their electrical field.
None at the moment.
The Jeth'vul were among the earliest original sophonts I made for Talveria, they were designed in 2021 though I never finished the original drawing. Their bioelectrical communication and electrolocation are heavily based off of the superfamily Mormyridae.