To some naturalists, Mastigias medusae in marine lakes, Palau, symbolize the evolutionary process (Faulkner, 1974). In the first scientific publication on marine lake Mastigias, Hamner & Hauri (1981) suggested that different long-distance horizontal migrations and different morphologies among populations isolated in three different lakes ‘might be considered of specific or subspecific importanc...

Catostylus mosaicus (Quoy & Gaimard, 1824) is a rhizostome jellyfish endemic to eastern Australia. Originally described from Port Jackson (Sydney) in New South Wales (Quoy & Gaimard, 1824), the species is thought to range from Port Phillip (Melbourne) in Victoria to the Torres Strait (Kramp, 1965; Southcott, 1982), i.e. across three biogeographic boundaries. Given recent reports of multiple cry...