David Fleetham / Sea snail (Thyca crystallina), two growing on host Blue sea star (Linckia laevigata). Philippines.
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Fred Bavendam / Snail (Annulobalcis sp) laying eggs on a cirri of its Crinoid host, Bali, Indonesia
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David Fleetham / Close up view of five parasitic snails (Eulimidae) attached to the underside of a Knobby seastar (Pentaceraster cumingi), Hawaii, Pacific Ocean.