from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun 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.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun ichthyology A soft, fleshy fin found on the back of a fish behind the
dorsal finand just forward of the caudal fin.
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