Figure 2 : Histological cross-sections of fully fecund O. faveolata polyps just prior to spawning (week 4) from each site.

From: Fertile fathoms: Deep reproductive refugia for threatened shallow corals

Figure 2

From left to right, in order of descending depth, Black Point (8 m), Flat Cay (19 m) and Grammanik Bank (39 m). In each example the polyp has at least 12 ripe gonads, all ova are stage IV (stained gold), and spermaries are stage V (stained red). Bar = 500 μm. See Supplementary Fig. S2 and Supplementary Fig. S3 for further reproductive structure identification.