How does the coloration of a mangrove snapper adapt based on its immediate surroundings?

Answer

A specimen in dark, tannin-stained roots might appear significantly darker, almost black

The fish's coloration is adaptive; a mangrove snapper residing deep within dark, tannin-stained mangrove roots can appear much darker than a specimen found near a bright, sandy bottom.

How does the coloration of a mangrove snapper adapt based on its immediate surroundings?
animalmarine lifefishtoothmangrove snapper