Wiktionary
omul
n. A salmon-like species of fish, (taxlink Coregonus autumnalis migratorius subspecies noshow=1), native to Lake Baikal in Siberia
Wikipedia
Omul
The omul, Coregonus migratorius, also known as Baikal omul , is a whitefish species of the salmon family endemic to Lake Baikal in Siberia, Russia. It is considered a delicacy and is the object of one of the largest commercial fisheries on Lake Baikal. In 2004, it was listed in Russia as an endangered species.