Kryptid In reply to Fishbug [2007-01-18 22:59:36 +0000 UTC]
Thanks. If it's a mutation, then its not an isolated one. Supposedly two such whales were seen stranded on the Shetland Islands by Sir Robert Sibbald. A mutation could well explain it though, since whales' dorsal fins contain no bones and are mostly fleshy. That would make them easy to generate.
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