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Lampreys

American Brook Lamprey - Unlike other lamprey species, whose teeth radiate around the oral opening, the American brook lamprey has large supraorals teeth above the oral opening, three bicuspid teeth on either side and the remaining teeth occur in small clusters.
Chestnut Lamprey - The chestnut lamprey has a notched, but not divided, dorsal fin; a head wider than its body; and an olive to brown or yellow color.
Least Brook Lamprey - Though limited in collection in the Coastal Plain to the upper Conecuh drainage, scattered collections of least brook lamprey have been made throughout Alabama except in streams of the Black Belt and Southern Pine Hills.
Mountain Brook Lamprey - Lateral line organs of the mountain brook lamprey are black on the back and unpigmented on the venter, a characteristic that separates the mountain brook lamprey from all other lampreys in Alabama.
Ohio Lamprey - Similar in appearance to the chestnut lamprey, the Ohio lamprey has a notched, but not divided, dorsal fin; a head wider than its body; and its color is slate gray to blue.
Southern Brook Lamprey - On the nonparasitic southern brook lamprey, the dorsal fin is slightly notched; the oral disc is narrower than the head; and the teeth are blunt and poorly developed.

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