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Pleurobranchaea
sp. #1

 
Pleurobranchaea sp. #1
Maximum size:  ( )

Identification:  This is a large tan species with a foot that extends well beyond the notum and has a dorsal spur at its tip. The oral veil has sensory papillae and the rhinophores are long and triangular. The notum varies from flattened to nearly spherical, perhaps depending on whether the animal has recently fed.

Natural history:  Probably a predator, Pleurobranchaea sp. #1 has been photographed from submersibles at 376-521 m (1233-1709 ft). Recent photos extend the range to about 1500 m (4921 ft).

Distribution:  Big Island, Molokai and Oahu.

Taxonomic notes:  It was first recorded in Hawaii by the Undersea Research Laboratory (HURL) during Pisces submersible dive # P5-11, principal investigator Alexander Malahoff, July 17, 1987.

Photo:  HURL-NOAA archives, Robert Moffitt (PI): side; about to feed?: 425 m (1394 ft); Oahu; Sept. 6, 1998.

Observations and comments:

Note 1:  ( )
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