David Hall / Northern basket stars (Gorgonocephalus eucnemis), branching and staghorn bryozoans, calcareous tubeworms, snails and barnacles, Baranof, Alaska, USA. August.

David Hall / Black Rockfish (Sebastes melanops) with encrusted rock wall; North Wall, Browning Pass, British Columbia, Canada. October. Encrusting organisms seen include calcareous tubeworms, crustose coralline al...

David Hall / Red Irish lord sculpin (Hemilepidotus hemilepidotus) camouflaged amongst Plumose anemones (Metridium senile), red soft coral (Gersemia rubiformis), various sponges, bryozoans and calcareous tubeworms....

David Hall / Tubeworms (Serpula columbiana) with feathery antennae extended, North Hanson Island, Johnstone Strait, British Columbia, Canada. March.