A dual nutrition mode (i.e., mixotrophy) can be advantageous for alien species in a new environment. In Cearà (Brazil), the symbiotic jellyfish Cassiopea andromeda is rapidly spreading under diverse environmental conditions across natural and human-altered coastal habitats, such as mangroves shrimp farms. Here we report on trophic ecology of upside-down sampled these two contrasting habitats du...

Large and small specimens of two species metagenic Scyphozoa (true jellyfishes) can be found in nearshore waters off central Namibia throughout the year. Whereas populations Chrysaora africana are largely restricted to inshore waters, C. fulgida occurs across shelf, with individuals large primarily offshore. We examined stable isotopes δ15N δ13C both Walvis Bay that large-sized have lower value...

Metacercaria specimens of the genus Opechona (Trematoda: Digenea: Lepocreadiidae) are described parasitizing “coelenterates” (scyphomedusae and ctenophores) from Southeastern Brazil (São Paulo state). The worms are compared to other Opechona species occurring on the Brazilian coast, but no association has been made because only adult forms of these species have been described. Suppositions as t...