claim: Louis Malle worked in a French industry.
evidence: Poecilia velifera , the Yucatan molly , lives in coastal waters of the Yucatan peninsula .. Yucatan peninsula. Yucatan peninsula. These live-bearer -LRB- Poeciliidae -RRB- fish are particularly well known for both the extreme size variation among males , and the sexual dimorphism between males and females in both body shape and behavior .. Poeciliidae. Poeciliidae. fish. fish. It is outwardly similar to the sailfin molly , P. latipinna , though larger overall and with a higher and longer dorsal fin in males .. sailfin molly. sailfin molly. dorsal fin. dorsal fin. Full-grown fish are usually larger than 10 cm -LRB- 4 in -RRB- and large females can reach almost twice this length , though especially captive-bred individuals grow only to the size of sailfin mollies .. fish. fish. The dorsal fins are the most distinctive character for telling the species apart  : Those of the Yucatan molly have nearly 20 fin rays , counting where the fin meets the back , whereas the sailfin molly has less than 15 -LRB- intermediate numbers may indicate hybrids -RRB- .. sailfin molly. sailfin molly. species. species. If the males spread their dorsal fins in display , these have a distinct fan or trapezoid shape , with the upper edge being distinctly longer than the lower .. trapezoid. trapezoid. The height of the dorsal fin , measured at the posterior edge , is a bit larger than the height of the tail .. dorsal fin. dorsal fin. posterior. Posterior ( anatomy )