Male molly fish in Mexico wear a moustache that makes them appear more sexy to females. Scientists were unsure why male Mexican mollies wear an extravagant moustache-like structure on their top lip. Now a study has revealed that female fish find the moustache sexually attractive, and it is likely to be a sexually selected trait.
Apart from an interesting piece on sexual selection this news item also highlights how little we know about even the most familiar of our fishes. Mollies – Poecilia sphenops, are sold in every tropical fish outlet the world over but not a single one has this ‘moustache’ and few, if any, hobbyists know that it occurs on wild fish.
It just goes to show, you never stop learning in this hobby.
Read more here.