APHOTOMARINE
An educational resource dedicated mainly to the photography
and diversity of marine life that can be found in coastal waters
and intertidal areas of Great Britain and Ireland by David Fenwick.
Calvadosia cruxmelitensis Corbin, 1978 - St. John's stalked jellyfish (Stauromedusae images)
Please record this species as Lucernariopsis cruxmelitensis until this sentence is removed.
St. John's stalked jellyfish
Calvadosia cruxmelitensis syn. Lucernariopsis cruxmelitensis
- on eelgrass 1
Calvadosia cruxmelitensis syn. Lucernariopsis cruxmelitensis
- on eelgrass 1
Specimen above is very typical of the species. Specimen was found on Eelgrass, Zostera marina, at Long Rock, Penzance, Cornwall. 27.11.11.
The images above were taken of species on Carragheen (Chondrus crispus), in a lowershore rockpool on an extreme low tide, on the reef in front of Penzance Harbour, Penzance, Cornwall. 21.03.11.
Above images are of a young juvenile specimen of approx. 5mm bell length (not oral diameter). Specimen found in a sample of Furbellow holdfast washings from near Sandy Cove, Newlyn, Cornwall. 27.07.17.
N.B. Identification of juvenile from the typically yellowish manubrium (mouth).
Images above taken of species on Coral Weed (Corallina officinalis) and Carragheen (Chondrus crispus)in a shallow middleshore rockpool next to Albert Pier, Penzance, Cornwall, 14.11.11.
Images above taken of species in a shallow middleshore rockpool close to Albert Pier, Penzance, Cornwall, 17.09.12.
Specimen above was found at Albert Pier, Penzance, Cornwall, 02.03.17. The specimen was found nearly dead so was used to examine the species under a microscope. N.B. White nematocysts look black under a microscope.
Comparison shot with Calvadosia campanulata syn. Lucernariopsis campanulata
See Stauromedusae UK for more information.
The main objective of this website is in furthering environmental awareness and education through the medium of photography. To increase awareness and access to the wildlife of the region and help
people find and identify it. Sometimes the difference between species is obvious but many species can only be determined by observing microscopic characteristics that are specific to any one species.