Editing Bull trout (section)

==Description==
Like other species of char, the fins of a bull trout have white leading edges. Its head and mouth are unusually large for salmonids, giving it its name. Bull trout have been recorded measuring up to {{convert|103|cm|in|abbr=on}} in length and weighing {{convert|14.5|kg|lb|abbr=on}}.<ref name=fishbase/> Bull trout may be either migratory, moving throughout large river systems, lakes, and the ocean, or they may be resident, remaining in the same stream their entire lives.<ref name=usfws/> Migratory bull trout are typically much larger than resident bull trout, which rarely exceed {{convert|2|kg|lb|abbr=on}}.<ref name=facts/> Bull trout can be differentiated from [[brook trout]] (''S. fontinalis'') by the absence of distinct spots on the [[dorsal fin]], as well as yellow, orange, or salmon-colored spots on the back as opposed to red spots with blue halos on the brook trout. Bull trout lack the deeply forked tail fin of [[lake trout]] (''S. namaycush'', another char).<ref name=usfws/>