Description
The Yaqui Sucker's body is fusiform and somewhat elongated, with relatively large head and eyes. The lips can be distinguished in that they are less fleshy than other Arizona suckers. The high dorsal fin has twelve fin rays. Anal, pelvic, and dorsal fins are all particularly larger in males than females. Laterally lined scales usually numbering between 62 and 73 mark the body of this sucker, and its head is counter shaded light below and dark above. The dorsal and caudal fins are dark, with other fins being either white or yellow. The Yaqui Sucker can be easily mistaken with its close relative, Catostomus insignis, unless the fin rays are counted.
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—Oscar Wilde (1854–1900)
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—Henry David Thoreau (1817–1862)