Eggs of Channeled apple snail - Pomacea canaliculata.

''Pomacea canaliculata'', common name the channeled applesnail, is a species of large freshwater snail with gills and an operculum, an aquatic gastropod mollusk in the family Ampullariidae, the apple snails.
South American in origin, this species is considered to be in the top 100 of the "World's Worst Invasive Alien Species".