We find another transparent ctenophora closer by the surface.
Sometimes there are so many of them, that the bottom becomes invisible; propagated comb jellies eat up pelagic plankton, larvae and eggs, causing disastrous decreasing of the plankton feeder marketable fish, which appear to be a principal prey for predators.
Similar invasion has happened, for example, at the eighties of the last century in the Black Sea, where accidentally settled Mnemiopsios leidyi comb jelly had none of it's natural enemies (such as fish and predatory ctenophora Beroe ovata feeding exclusively on Mnemiopsis).
Sometimes there are so many of them, that the bottom becomes invisible; propagated comb jellies eat up pelagic plankton, larvae and eggs, causing disastrous decreasing of the plankton feeder marketable fish, which appear to be a principal prey for predators.
Similar invasion has happened, for example, at the eighties of the last century in the Black Sea, where accidentally settled Mnemiopsios leidyi comb jelly had none of it's natural enemies (such as fish and predatory ctenophora Beroe ovata feeding exclusively on Mnemiopsis).
