Can you ID these fish for us?

[MuskieBait]

First fish is a Fallfish. The dark crescents at the base of each scale is very strong ID characteristic of the Fallfish. These crescents should be found at the base of every scale from the back to just past the lateral line. The way the fish was held and the angle of the light prevents most of these crescents from showing, but the scales near the nape has very clear dark crescents.

Yes, the second fish is a White Sucker.

The third fish is a Common Shiner. I'm not sure what Michael meant by the "raised lateral line scales", but you can ID this fish by the dipping lateral line (it dips down toward the belly and then rises up again toward the tail), scales along the side that is taller than they are wide, and as you commented, some of the scales are greenish-brown while most of them are silver. These odd scales are distributed randomly along the side, creating a look as if the fish was missing the odd scale here or there. There are no other minnows in Ontario with this characteristics, except for the Striped Shiner occasionally. As Michael indicated, Common Shiner also has crowding of the scales behind the head, while Striped Shiner's scale is not crowded, and the Striped Shiner has faint V-shaped strips on the back if viewed from the top.

The fourth is Creek Chub. Creek Chub has finer scales, a black spot at the anterior base of the dorsal fin, and usually a spot at the base of the tail. The tail spot may be lost in some individuals though. Creek Chubs also has a wide head with a relatively large mouth that extends toward the eye.