Gelatinous zooplankton (GZ) can impact productivity of marine ecosystems through competition with small pelagic fish and predation on early life history stages of species from multiple trophic levels. Nevertheless, GZ do not always represent ‘trophic

Scyphozoan jellyfish develop dramatic population blooms, which may significantly alter marine food webs. In turn, hyperiid amphipods parasitising jellyfish can occur in such great numbers that they represent an important trophic link to diverse species

In southern Puget Sound, large numbers of megalopae and juveniles of the brachyuran crab Cancer gracilis and the hyperiid amphipod Hyperia medusarum were found riding the scyphozoan Phacellophora camtschatica. C. gracilis megalopae numbered up to 326

Gelatinous zooplankton (GZ) can impact productivity of marine ecosystems through competition with small pelagic fish and predation on early life history stages of species from multiple trophic levels. Nevertheless, GZ do not always represent ‘trophic