Figure 1.

Bleaching and lysing in G. fascicularis during heat stress treatment. No apparent bleaching and lysing were observed in control groups (C_10h and C_18h), while in group H_10h (10 h after heat stress treatment), some phenomena of bleaching and lysing initiation began to appear, the cup edges of a few polyps and the coenosarcs turned white (yellow ellipse). As the heat stress continued, in group H_18h (18 h after heat stress treatment), the coenosarcs became lysed and degraded and the tentacles were dissolved into dark brown mucus (red ellipse).