Until now, 7 species of true eels (Anguilliformes) were known to exist in British Columbia based on literature records and museum specimens; Nemichthys scolopaceus, Avocettina infans, Serrivomer jesperseni, Xenomystax atrarius, Thalassenchelys coheni, Venefica ocella and V.
Occurrence of Thalassenchelys coheni (Anguilliformes; Chlopsidae) in the west Pacific Ocean.
The grouping of anguilliform and saccopharyngiform fishes is expected (see Fig.
The order Anguilliformes is usually considered a monophyletic group, and the well-supported grouping of the anguilliform genera Conger and Anguilla (with a bootstrap value of 91%) is thus expected (see e.g.
Many modes of terrestrial locomotion have evolved among fishes, including ambipedal progression using pelvic fins (Harris 1960), use of rapidly twisting tail movements (Hseih 2010), anguilliform undulations (Gillis 1998), jumping using ventral suckers (Ebeling and others 1970), and walking using large subopercular spines (Sayer 2005).
Sayer (2005) noted in his review of adaptations of amphibious fishes for life out of water that most eel-like fishes, including Stichaeidae, use anguilliform locomotion in both aquatic and terrestrial environments.
During an experiment to determine how anguilliform
locomotion (propulsion by passing lateral waves down the entire body length (2)) of elvers affects chemo-orientation, we observed elvers casting and filament tracking, two behaviors that are previously unreported in this genus.