Effect of seawater concentration on growth and fruiting body formation on agar. (A to F) HW-1 on DVY and 20%, 40%, 60%, 80%, 100% HVY, respectively. (G to J) SMP-2 on 20%, 40%, 80%, and 100% HVY, respectively. The structures are the fruiting body structures on the media. There were no fruiting bodies in HW-1 cultures with 100% seawater (F) or in SMP-2 cultures with 20% seawater (G). (A, B, C, E, G, and I) Bars = 0.5 cm; (D and H) bars = 0.6 cm; (F) bar = 0.2 cm; (J) bar = 0.7 cm. The bars for the insets in panels A, B, C, D, E, H, I, and J are all 50 μm long.