Dreugh

The Dreugh are a Tamrielic race observed primarily in Morrowind, the Illiac Bay, Black Marsh and Cyrodiil. Once common throughout Vvardenfell, Ebonheart and the surrounding waters, they've been driven into isolated pockets.

Biology
Dreugh are a race of creatures with claw-like limbs, pincers and scuttling feet "protruding from a human-torso-sized skeletal frame", who secrete a particularly valuable shell wax from their bodies. The Land Dreugh's naturally sturdy carapace is known to deflect most attacks from common weapons. According to legend, the Dreugh devolved from a much more intelligent and civilized race due to conflict with the Dunmer (who used their hides and wax), and powerful, tyranic Dreugh kingdoms are reported by Mankar Camoran in his Mythic Dawn Commentaries. Additionally, tales of civilized Land Dreugh colonies (purported to have built stone cairn houses and structures) exist, which affirm that the species raised mudcrabs, but no evidence of such behavior exists today.

Fronto Maecilius states that the race migrates from the Abecean Sea into the Iliac Bay, and notes a period known as the Karvinasim, a period of transformation in which Dreugh walk on land, "favoring shoreline marshes and rivers close to the open water". He also suggests that the Karvinasim heightens the individual's martial instincts, especially speed and hostility (which led to the evisceration of the writer's lead geographer, Pulcherius Pomptinus, by a territorial broodmother).

At the end of the Karvinasim (after about a year of land walking), the Dreugh return to the water, undergoing a final transformation called Meff (noting that "meff" is also a verb ). During Meff, the Dreugh submerge, devouring their land skin and air organs in a self-cannibalistic manner, as those become unneeded. After eating, they vomit the congealed remains as small fibrous balls known as Grom, that are approximately a foot in diameter. The spheres are described as foul-smelling, are found in clusters around lakes, and have no known "virtues".

An unknown researcher, albeit based on his own observations, reports in his findings that Land and Water Dreugh could belong to two distinct species, as opposed to life cycles. The same source also refers to some accounts that seem to explain a difference between two types of Land Dreugh as sexual dimorphism. Dreugh appear to have an omnivore diet, and have even been observed consuming mer flesh. They can channel a form of shock energy through their bodies as a natural adaptation (instead of magical ability), the way most scholars see it.

Behavior
Dreugh have no known language nor advanced communicative capabilities, and lay their egg broods in muddy areas. The eggs are often stolen by fisherfolk, to which the broodmothers who guard them react extremely violently. The dreugh were also said to worship a creature known as the Ruddy Man, which is believed to be a manifestation of the Daedric Prince of Domination, Molag Bal.