Colossendeis Colossendeis acuta Colossendeis belekurovi Colossendeis colossea Colossendeis proboscidea Colossendeidae Dodecolopoda Decolopoda List of sea spiders of South Africa William Thomas Calman Venus flytrap sea anemone Palaeoisopus Deep-sea gigantism Largest and heaviest animals McMurdo Sound Sea spider