adipose fin

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Related to adipose fins: ventral fin

adipose fin

[′ad·ə‚pōs ‚fin]
(vertebrate zoology)
A modified posterior dorsal fin that is fleshy and lacks rays; found in salmon and typical catfishes.
References in periodicals archive ?
Can't keep wild ones, so everybody's hoping to see that adipose fin clipped off.
is distinguished from the remaining species of the genus Leporinus by its color pattern of: one longitudinal and discontinuous narrow dark brown stripe running inconspicuously from a vertical through middle of dorsal fin to base of caudal peduncle along lateral line; two or three large dark brown vertically elongated blotches along middle trunk: first at the vertical through dorsal-fin, second anterior to adipose fin and third on the caudal peduncle; mainly in young specimens, 12-13 short transversal dark brown bars meeting small dark brown blotches laterally.
The exception is for fish released in waters, such as the McKenzie, where adipose fin clips are used on hatchery fish to help prevent the harvest of wild fish.
Meanwhile, two larger silver salmon caught by Kristi Roelle still had their adipose fins and were released, as was a small chinook that wouldn't have been of legal size even if chinook could be kept.
Language allowing Umpqua and North Umpqua River anglers to harvest limited numbers of winter steelhead with intact adipose fins will no longer appear in the regulations.
About 10,000 rainbow trout with clipped adipose fins will be released this week in the McKenzie River between Leaburg Dam and Blue River.
About one in 10 Willamette spring chinook this year will be wild; the others will have hatchery-clipped adipose fins.
Normally, hatchery fish have clipped adipose fins, which tell anglers the fish are OK to keep.
Another 3,050 salmon with intact adipose fins were released, according to creel surveys.
The 18 coho seized still had intact adipose fins, indicating that they were probably wild and not legal to keep.
While most of the released fish were coho with intact adipose fins, that category also includes fish below the minimum size or hatchery coho released by anglers targeting chinook.