Cnidarian internal stinging mechanism.

Proceedings. Biological Sciences
Ami SchlesingerYossi Loya

Abstract

Stinging mechanisms generally deliver venomous compounds to external targets. However, nematocysts, the microscopic stinging organelles that are common to all members of the phylum Cnidaria, occur and act in both external and internal tissue structures. This is the first report of such an internal piercing mechanism. This mechanism identifies prey items within the body cavity of the sea anemone and actively injects them with cytolytic venom compounds. Internal tissues isolated from sea anemones caused the degradation of live Artemia salina nauplii in vitro. When examined, the nauplii were found to be pierced by discharged nematocysts. This phenomenon is suggested to aid digestive phagocytic processes in a predator otherwise lacking the means to masticate its prey.

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Citations

Apr 8, 2020·The Journal of Experimental Biology·Qingxiang GuZemao Gu
Feb 1, 2017·Cell and Tissue Research·M Raz-BahatB Rinkevich
Apr 11, 2017·Acta Zoologica·Susanna M Strömberg, Carina Östman
May 23, 2021·BMC Microbiology·Justin MaireMadeleine J H van Oppen
Jun 19, 2021·Toxicon: X·E P O'HaraJ E Seymour

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