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Anatomy diagram of a typical Eirenidae medusa and polyp with labels. Some sections cut away. Medusa not to scale. Drawing of medusa (1A) by Brenden Holland, image of ring canal with marginal tentacles and rudimentary bulbs (1B, C) by Gerald Crow, and image of polyps (1D) by Shuhei Ikeda, Tsuruoka City Kamo Aquarium.
