Inhabiting the waters of Tamriel are Fish. These aquatic creatures vary in species and appear throughout The Elder Scrolls.
Starting with The Elder Scrolls II: Daggerfall, Sluaghterfish have appeared in every installment in the series. The Elder Scrolls IV: Oblivion featured a special type of this species of fish, the Rumare Slaughterfish. The Rumare Slaughterfish were stronger than their counterparts, and acquired their name due to inhabiting Lake Rumare in Cyrodiil.
Salmon are the common fish in the rivers of Skyrim, providing an abundant food source.
Abecean Lonngfins are blue fish that are used as Ingredients in alchemy.
Cyrodilic Spadetails are a crimson red with a white head. They are also used in alchemy. They combine with Abecean Longfins when making Fortify Restoration potions.