Atherinopsis californiensis sunan kimiyya ne na nau'in kifin da aka fi sani da Topsmelt. Topsmelt karamin kifi ne mai launin azurfa wanda ake samu a bakin tekun Pacific na Arewacin Amurka, daga Alaska zuwa Baja California. Yana cikin dangin Atherinopsidae kuma an san shi da siririn sa, mai tsayin jiki da tsararren azurfa a gefen sa. Sunan Atherinopsis ya samo asali ne daga kalmar Helenanci "atherina," wanda ke nufin smelt, da "opsis," wanda ke nufin kamanni ko kamanni, yana nufin kamanceceniya da sauran nau'in kifi masu wari. Sunan jinsin californiensis yana nuna cewa ana samunsa a California.