Sub-Arctic invertebrates

Underwater photographs of sub-Arctic marine and freshwater invertebrates other than mollusks which can be seen in the sub-Arctic mollusks gallery.

The planarian Polycelis coronata borealis
The planarian Polycelis coronata borealis is commonly found living on the underside of rocks in Alaska salmon streams. Photgraphed in situ during winter.
The planarian Polycelis coronata borealis
The multi-eyed planarian Polycelis coronata borealis can be found living under rocks in salmon streams. Aspect Ratio = 4:5.
Orange Sea Pen
Orange Sea Pen (Ptilosarcus gurneyi).
Christmas Anemone
Christmas Anemone (Urticina crassicornis). The Christmas anemone has a circumpolar marine distribution from the lower inter-tidal zone to depths of 30 meters. Photographed underwater in British Columbia. Phylum Cnidaria, Class Anthozoa, Subclass Zoantharia, Order Actiniaria, Suborder Nynantheae, Family Actiniidae
Giant California Sea Cucumber
Giant California Sea Cucumber (Parastichopus californicus).

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