A member of the Bothidae family of left-eyed ﬂatﬁsh, the longfin sanddab is a small but common bottom-fishing catch by anglers, particularly in Southern California.
IdentificationThe body of the longﬁn sanddab is oblong and compressed. The head is deep, the eyes are large and located on the left side, and the mouth is large. The color is uniformly dark with rust-orange or white speckles, and the pectoral ﬁn is black on the eyed side. The blind side is white.
This species can be distinguished from the Pacific sanddab by the length of the pectoral ﬁn on the eyed side, which is always shorter than the head on the Pacific sanddab and longer than the head on the longﬁn. Sanddabs are always left-eyed and can be distinguished from all other left-eyed ﬂatﬁsh by having a lateral line that is nearly straight along its entire length.