Steelhead populations and rainbow trout populations can and do interbreed at different levels. 刚头种群和虹鳟种群可以杂交，实际上也发生不同水平的杂交。
It is possible for the offspring of rainbow trout to become anadromous and for the offspring of steelhead to develop a resident life history. 陆封的虹鳟后代可以转变成溯河型，溯河刚头后代也可以转变成陆封型。
