Small. Male tail ray fusions between rays 4 and 5, 6 and 7, 8 and 9. Crumpled spicules. Semidominant with respect to body size.

NOTE: This strain can be sensitive to starvation; the authors recommend that anyone using this strain for their work should propagate the stock for several generations after starvation before conducting experiments. Reference: Chen AL, et al. Nat Chem Biol. 2019 Mar 25. doi: 10.1038/s41589-019-0243-4.