a Figure displaying life cycle stages of C. xamachana (observed in this study) and associated cassiosome-laden mucus release by the medusae. Pie charts indicate proportion of nematocyte types for polyps (n = 3 distinct polyps), strobila/ephyrae (n = 3 distinct ephyrae), medusa (n = 3 distinct medusae), mucus (from n = 4 distinct medusae), and cassiosomes (from n = 4 distinct medusae), based on measurements of multiples of each nematocyst type per life stage (see details in Supplementary Table 1). b, c Different nematocyst types isolated from C. xamachana medusae oral-arm filaments corresponding to colors in pie charts in (a): a-isorhiza intact (light blue arrow), O-isorhiza intact (green arrows) and deployed (dashed green arrow), and rhopaloid intact (lavender arrow) and deployed (dashed lavender arrow); and Symbidinium (brown arrows). d Mucus contents of C. xamachana containing a triplet of rhopaloid nematocysts (lavender arrows) intact within nematocytes, and Symbiodinium (brown arrow) disassociated from jellyfish tissue but still within amoebocytes (pink arrows). Scale bar: b, d = 10 μm; c = 20 μm.