... that the small fish species Poecilia vandepolli existed, then it did not, and now it does again?
Source: "Poecilia vandepolli Van Lidth de Jeude, 1887 is re-examined and resurrected from synonymy as the Antillian representative of P. sphenops Valenciennes, 1846." [1]
ALT1: ... that the small fish species Poecilia vandepolli was resurrected in 1992? Source: "Poecilia vandepolli Van Lidth de Jeude, 1887 is re-examined and resurrected from synonymy as the Antillian representative of P. sphenops Valenciennes, 1846." [2]
ALT2: ... that Vandepoll's molly solves food shortage problems by eating its own offspring? Source: "In a confined area, only lack of food seems to keep down the population at a certain density. The offspring will for the greater part either starve to death or be consumed by the cannibalistic adults, the latter phenomenon being more important than the former as we know from looking at the stomach contents." [3]