Now males have been observed to prod the female's genital opening prior to copulating with her, and in what I have lovingly termed the Magnum, P.I. hypothesis, females are overwhelmingly more likely to be found with males that have these fish mustaches.
Man har nu observeret, at hannerne gnubber mod hunnens kønsåbning før han kopulerer med hende. Og i hvad jeg elsker at kalde Magnum P.I.-hypotesen, er hunner i langt højere grad tilbøjelige til at vælge hanner, der har disse fiskeoverskæg.