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Figure 5 | Frontiers in Zoology

Figure 5

From: Regulation of red fluorescent light emission in a cryptic marine fish

Figure 5

Change in fluorescence spectrum after application of KCl. Micrographs of a section through the iris under bright field (A), bright field and fluorescence (B), fluorescence (C) and polarized light (D), showing that the fluorescence emanates from the stratum argenteum, a layer of iridophores with guanine crystals (see D compared to B and C) (labelling in accordance with [37], p. 47). This layer is invaded by finger-like extensions of melanophores at the posterior side of the stratum argenteum (dark). The anterior (outward facing) side is at the top.

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