Bull trout from Oregon. Photo by Roger Bloom.
- Closely related to and commonly misidentified as brook trout (both are members of the char family).
- A distinguishing characteristic is the lack of black spots on the dorsal fin.
- Do not have vermiculations that occur on brook trout.
- While variable, bull trout body coloration is primarily grayish-green, fading to a white or orange belly.
- Vibrantly-colored spots on the body may range from white to pale-yellow, or even pink to red.
- Fins are spotless except for a few yellow dots at the base of the tail.
- Lower fins with orange and red hues and a white leading edge.
- The head is broad and long compared to other char and trout.
- The flattened head with eyes positioned towards the top is assumed to help bull trout observe prey located above them, as they generally hold at or near the bottom under cover and are ambush predators.