Biology.
It is unknown exactly how Sload reproduce. They are believed to be hermaphrodites in their youths, though the sexual organs seem to be absorbed by the time they are old enough to survive on land. Sload parents seemingly have no interest in the fate of the young. Sload begin their lives as "disgusting little amorphous grubs" according to Bendu Olo, leader of the punitive expedition sent by Tamrielic nations to Thras after the Thrassian Plague. As they age, these grow into a purely aquatic stage that is described as "soft", "squishy" and "octopuslike". Upon reaching adulthood the Sload becomes amphibious and has an appearance similar to a large, vaguely humanoid slug. While young, adults generally lack many of the skills to survive on land. As they age, Sload tend to grow in size and corpulence, and many older Sload would collapse under their own weight if not bouyed up by water or by magic means. There is no known limit to either the age nor the size of an adult Sload. Understandably, this limits their activities on land. When on land, their default mode of travel is magical teleportation, especially the Recall spell, which they instinctively use when greatly distressed.

Adult Sload have four appendages which behave partially as pseudopods, in that they mold themselves around whatever the Sload is grasping. This takes some time but allows them to attain a very good grip on practically anything, allowing them to climb things many other races can't. Despite this, their ability to use tools is limited.

Sload are highly intelligent and have perfect recall of practically anything they have ever seen or heard. They are quite skilled at magic, particularly necromancy and teleportation magic.

The Sload are a race of sluglike beastmen (hence the name, a portmanteau of "slug" and "toad") living in the Coral Kingdoms of Thras, southwest of Tamriel. They are adept with magic, however they are exceedingly cautious for sentients. They produced the famed necromancer N'Gasta.

History
The Sload Coral Kingdoms have generally followed an isolationist policy, with only limited contact and trade with Tamriel. Therefore their history is not greatly known. The most important event known is when they released the Thrassian Plague upon Tamriel in 1E2200, killing more than half of the population. In response, Tamriel assembled the All Flags Navy that ravaged Thras, killing all the Sload it could find and finally sinking it with unknown magics. The Sload, however, survived, and Thras has since risen again.

Extra: Elder Scrolls Travels next one might be set in Thras, you never know. and maybe it will be for PC.
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Research by Conner97