Alex Mustard / Three hairy sea spiders (Tanystylum grossifemorum) feeding on red soft coral (Gersemia rubiformis). Browning Pass, Port Hardy, Vancouver Island. British Columbia. Canada. North East Pacific Ocean.

Richard Robinson / Sea spider (Pycnogonida sp) in Dusky Sound, Fiordland National Park, New Zealand.

Georgette Douwma / Sea spider (Pycnogonid) Rinca, Komodo National Park, Indonesia

David Shale / Hermit crab with anemone. Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

David Shale / Pycnogonid (Hedgpethia sp.) on coral. Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

David Shale / Pycnogonid (Hedgpethia sp.) on coral. Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

David Shale / Pycnogonid (Hedgpethia sp.) on coral. Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

David Shale / Pycnogonid (Hedgpethia sp.) on coral. Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

Solvin Zankl / Sea spider (Nymphon gracile), Trondheimfjord, North Atlantic Ocean, Norway.

David Shale / Deep sea Sea spider {Pycnogonida) from Mid-Atlantic Ridge, depth 2600m

David Shale / Deep sea Sea spider {Pycnogonida) from Mid-Atlantic Ridge, depth 2600m

David Shale / Sea spider {Pycnogonida} benthic, Barents sea, Northern Europe