Fig. 2
From: Hydroidfest 2016: celebrating a renaissance in hydrozoan research
Cnidarians provide unique research opportunities. a Following formation of an aggregate from a suspension of Hydra cells, endodermal (red DsRed2) and ectodermal (green GFP) epithelial cells separate into distinct tissue layers. Left T = 0 h. Right T = 4 h (courtesy of O. Cochet-Escartin; scale bar 200 µm). b Aiptasia with Symbiodinium symbionts. Left polyp (blue, Hoechst staining); symbionts (red). Right magnified view of the boxed region in the left image (courtesy of T. Tivey; scale bar 15 µm)