Bull trout ( Salvelinus confluentus ) are adfluvial ( adults spawn in streams but subadults and adults migrate to lakes for feeding ) and sometimes develop a kype , however .
This may occur in some populations .
Bull trout ( Salvelinus confluentus ) are adfluvial ( adults spawn in streams but subadults and adults migrate to lakes for feeding ) and sometimes develop a kype , however , although this may occur in some populations .