| 31. | The adipose fin is 3 to 4 times as long as it is deep.
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| 32. | The adipose fin is 4 to 5 times as long as it is deep.
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| 33. | The adipose fin is large, does not contain any rays, and has a convex shape.
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| 34. | The adipose fin is 3 1 / 2 times as long as it is high.
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| 35. | The African butter catfish has a compressed body and an adipose fin is always present.
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| 36. | The adipose fin is short, does not contain any rays, and has a convex shape.
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| 37. | Pangasiids have compressed bodies and single small adipose fins.
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| 38. | The mud darter does not have an adipose fin.
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| 39. | The dorsal fin is located in the middle of the back, with a small adipose fin.
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| 40. | It has a small terminal mouth, and an adipose fin may or may not be present.
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