Indomethacin-induced strobilation in five species.

<p>All animals are oriented oral end facing up. Panels A-E are control polyps, panels F-J are animals exposed to indoles. A) <i>Aurelia aurita</i> polyp from southern Japan, and F) the same species showing classic polydisc strobilation, with each segment being a small immature ephyra. B) <i>Mastigias papua</i> polyp, and G) with classic monodisc strobilation, where the calyx slowly transforming into an ephyra. Note that the tissue below the calyx is not metamorphosing back into a polyp, which is typical of continuous exposure to indoles. C) <i>Cotylorhiza tuberculata</i> polyp, H) with monodisc strobilation, showing a constriction at the base of the calyx. D) a polyp of <i>Linuche</i> sp., showing classic coronate morphology in a chitinous tube, and I) in the presence of an indole, with a i) sealed operculum, and ii) retracted polyp. E) a polyp of the box jelly <i>Carybdea</i> sp., and J) the same species after metamorphosis into a small medusa, complete with a fragment of polyp tissue (at the apex of the bell). Scale bars = 1 mm.