B

Figure 6. (A) Skin of cuttroat trout (Oncorhynchus clarki henshawi) not exposed to UV. Mucous cells (open arrows) are scattered throughout the epidermis. Melanocytes (filled arrows) are seen on either side of the stratum compactum. Bar equals 50 ¡xm. (B) Skin after 72 h of UV exposure. Note: epidermis is lifted off the basement membrane, and the area between the dermis and epidermis is filled with necrotic cells, inflammatory cells, and exudates. A few sunburn cells (arrows) with glassy, pyknotic nuclei and perinuclear halos can be seen. Bar equals 19 /an. [From Blazer et al. 15.]

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