APHOTOMARINE

An educational resource dedicated mainly to the photography
and diversity of marine life that is found in the coastal waters
and rockpools of south-west England. Images by David Fenwick.

A-P-H-O-T-O Wildlife Stock Image Library
Pisa tetraodon (Pennant, 1777) ? - Four-horned spider crab (Crustaceans)
Scroll down and rollover titles to change screen image or click on title to view image.
Four-horned spider crab
Pisa tetraodon ?
- ventral view / abdomen 1

Four-horned spider crab
Pisa tetraodon ?
- ventral view / abdomen 2

Four-horned spider crab
Pisa tetraodon ?
- dorsal view / carapace 1

Four-horned spider crab
Pisa tetraodon ?
- dorsal view / carapace 2

Four-horned spider crab
Pisa tetraodon ?
- lateral view 1

Specimen found under a rock on the lowershore at Hannafore, near Looe, Cornwall. 12.03.09. The tide that day was an extra low spring tide and many people were able to cross to St. George's or Looe Island.

? - The identification to Pisa sp. here is certain and thanks go to Dr. Pierre Noël of the Muséum national d'Histoire naturelle, Paris, France; for pointing out the genus and suggested the species is likely to be P. tetraodon. County records for Cornwall also suggest the specimen is likely to be this species. However, the crab is covered by too much algae for the images to be of use to identify the species.

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.