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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Can't keep wild ones, so everybody's hoping to see that adipose fin clipped off."
Dorsal profile from anterior margin of snout to origin of dorsal fin insertion slightly convex and very little arched; almost straight at dorsal-fin base and straight from dorsal-fin terminus to adipose fin; concave at caudal peduncle between adipose and caudal fin; ventral profile convex in slight uniform curvature from inferior mandible to vertical through pectoral-fin basis and almost straight from this point to origin of anal-fin insertion; straight at anal-fin base and concave at caudal peduncle between distal anal and caudal-fin insertion.
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.
Anglers were averaging about two coho per rod - unfortunately, half of the salmon had intact adipose fins and had to be released.
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.