The stalked jellyfish: Lucernariopsis cruxmelitensis

Lucernariopsis cruxmelitensis is the smallest member of a family of species known as stalked jellyfish. Even at its largest, it does not quite reach 1cm in height. Description Lucernariopsis cruxmelitensis resembles an upside-down jellyfish, with its translucent bell underneath and tentacles on the top. There are eight webbed arms within the maroon bell, with up to 35 rounded tentacles at the end of each. The stinging organs of this stalked jellyfish are very distinctive as white spots on the surface of the bell forming the shape of a Maltese cross. Habitat Lucernariopsis cruxmelitensis lives on rocky shores that are exposed to moderately strong waves and currents. It can be found close to the low tide mark or in shallow water. Unlike other stalked jellyfish, it is rarely attached to seagrass but is often found on small, red seaweeds, such as Irish moss. Ecology Stalked jellyfish are closely related to anemones, free-floating jellyfish, and corals, all of which have stinging tentacles to paralyse or kill their prey and to protect themselves from predators. Status Estimated reduction of population size of 90% from 1970s to 2005. This species was found in often high numbers in south-west England - for example an estimated 2000 where found in one shore search at Wembury in 1969 - but is now rarely seen. Distribution The distribution of Lucernariopsis cruxmelitensis appears to be limited to the south-west of England, from Swanage to north Devon, and the Atlantic coasts of Ireland. • Name the other species by clicking on the links on the right-hand side or the previous and next buttons at the top of the page