Average daily body length gain (ADL) during each of the 7 developmental stages.

A: ADL (cm day-1) of S. stellaris embryos during each developmental stage. Lines show mean ± SD (n = 8), while points show measurements from each individual. Dissimilar letters indicate statistical differences between stages (RM one-way ANOVA, P -1) of S. canicula embryos during each developmental stage. Lines show mean ± SD (n = 8), while points show measurements from each individual. Dissimilar letters indicate statistical differences between stages (RM one-way ANOVA, P -1) between S. stellaris (purple) and S. canicula (pink) embryos at each developmental stage. Values represent mean ± SD (n = 8). There was no statistically significant difference between species at any stage (Mann-Whitney U test, P < 0.05).