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.
Cladonema radiatum Dujardin, 1843 - Root-arm medusa (Hydrozoa images)
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Root-arm medusa
Cladonema radiatum
- lateral view 1
Cladonema radiatum
- lateral view 1
Root-arm medusa
Cladonema radiatum
- lateral view bell 1
Root-arm medusa
Cladonema radiatum
- tentacles 1
Root-arm medusa
Cladonema radiatum
- with 0.1mm division rule 1
Specimen above found in a rockpool at Battery Rocks, Penzance, Cornwall. 30.07.18.
Root-arm medusa
Cladonema radiatum
- lateral view 2
Root-arm medusa
Cladonema radiatum
- lateral view 3
Root-arm medusa
Cladonema radiatum
- lateral view 4
Root-arm medusa
Cladonema radiatum
- tentalcles (x40) 1
Specimen above found in a rockpool on the lowershore at Long Rock, Cornwall. 01.08.15. Specimen measured approx. 2.5-3mm diameter.
Root-arm medusa
Cladonema radiatum
- two specimens 1
Specimens above found at Battery Rocks, Penzance, Cornwall. 25.07.17.
Root-arm medusa
Cladonema radiatum
- in aquarium 1
Root-arm medusa
Cladonema radiatum
- in aquarium 2
Specimen above found in a cold-water marine aquarium at the authors home. Specimen which was 2-3mm dia. was possibly imported with local seawater, which was taken from Penzance Harbour, Penzance, Cornwall. 30.04.11.
Root-arm medusa
Cladonema radiatum ?
- polyp 1
Root-arm medusa
Cladonema radiatum ?
- polyp 2
The 0.2-0.3mm polyp here is possibly Cladonema radiatum, it was found in shell sand, on a piece of the bryozoan Cellaria, from a sample taken from the lowershore of a spit found in front of Smeaton's Pier, St. Ives, Cornwall. 23.10.14.
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.