adipose fin


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adipose fin

n.
A fleshy rayless fin located on the back of a fish between the dorsal fin and the caudal fin, found in certain fishes such as salmon, trout, and catfishes.
References in periodicals archive ?
9A), which described the following transformations: contraction between the dorsal and adipose fins (landmarks 9 and 10), increased caudal peduncle depth (11-15) and expansion of the predorsal area (landmarks 6-8, Fig.
1%); posterior tip of pectoral fin not extending to pelvic-fin origin; color in preservation: trunk dark tan to brown dorsally, paler ventrally; 6-8 dark, vertical cross-shaped markings along trunk in specimens <100 mm SL, crosses disappearing or becoming indistinct dark patches in larger specimens; dark pigment present along posterior margin of ventral portion of upper caudal-fin lobe and along entire posterior margin of lower lobe, sometimes extending onto main portion of ventral lobe; dorsal half of adipose fin dark; in life, adults olive to tan.
Median dorsal line of trunk with 15-16 scales between supraoccipital and dorsal-fin origin, 11-13 between dorsal fin and adipose fin and 8-9 between adipose fin and upper caudal-fin insertion.
Dorsal to adipose distance is measured from the base of the last dorsal-fn ray to the origin of the adipose fin.
Blackwater trout can be identified by the intact adipose fin, the small fin on the trout's back between the tail and the large dorsal fin.
The first segment, July 1-31, will be an "all salmon mark-selective coho fishery" in which anglers will be allowed to retain only coho with a clipped adipose fin.
Rainbow trout have a speckled back, and most but not all hatchery rainbow trout have had their adipose fin - the fin on their back, between their main, or dorsal fin, and the tail - clipped.
Anglers, of course, may target only hatchery-reared "springers," marked by a clipped adipose fin.
It's a selective coho season, which means a limit of two salmon per day that have a healed adipose fin clip.
13 or 15,000 selective coho quota with a bag limit of two salmon, all coho must have a healed adipose fin clip.
The bulk of the 2011 ocean coho season in waters south of Cape Falcon, near Tillamook, will operate under the now-familiar "marked-selective" rules, meaning only coho with a healed adipose fin clip may be kept.