I reckon you should give that to goldfinch. All the Magnapinnidae unknown from specimens which are well under a meter long, under the famous photograph doesn't doesn't have a species name attached to it yet.
Actually yes, I think that would be fair. On Wikipedia, I've just found that 'Magnapinnidae' jumps directly to the particular species in question. So I shall hereby pass on this very, very long, writhing, sucker-covered, er, baton.