For your delectation this morning, I present...

A monkfish.

To resolve a debate which began at dinner two days ago about the wisdom of eating a rare species.

(I ate.)

And then what its tail might look like.

(Spindly as it turned out.)

My fellow debate-e kindly emailed me this pic this morning.

So now I (and you) know.

(Though you (Siobhan and BS) probably knew already.)

Enlightened (me).