I learned today about the Halibut, from a recent visitor to Grimsby fish market.
Halibut, which are huge great, rather ugly fish, are almost always caught in pairs.
The reason is, so its believed, that Halibut mate for life.
And when one is caught, the other swims into the net with its mate.
The rather unglamorous Halibut doesnt quite have the sex appeal that the swan does.
So it doesnt get the same press.
All hail the Halibut.