Figure 2
From: Calcareous sponges can synthesize their skeleton under short-term ocean acidification
Detail of the shape of the spicules (SEM images) in (a, b) control; and (c, d) low pH. Red squares in (a) and (c) correspond to images (b) and (d), respectively. Scale bars = (a, c) 50 µm; and (b, d) 20 µm. u = unpaired actine.
