isaza goby (Gymnogobius isaza)
A small freshwater goby endemic to Lake Biwa, Japan. Often used in local cuisine.
The isaza goby is a species endemic to Lake Biwa and is often made into tsukudani.
ice goby (Leucopsarion petersii)
A small, transparent goby found in coastal waters of East Asia. Sometimes also called シロウオ, but イサザ can refer to this species in certain contexts.
Neomysis intermedia (a mysid shrimp)
A small mysid shrimp species. This usage is less common and may be regional or specific to certain fishing communities. See also イサザアミ.
See also: イサザアミ
Isaza is sometimes confused with shirouo, but it is a different species.
It is also called isaza-ami, but sometimes simply referred to as isaza.