What unique feature characterizes the retina of Chauliodus sloani?
Answer
Several rows of rod cell banks stacked on each other
The retina of Chauliodus sloani displays an extreme adaptation for low-light survival. Unlike typical vertebrates that have a single layer of receptors, the viperfish possesses multiple banks of rod cells that are stacked on top of one another. As the fish increases in size, the number of these banks also grows. This structural configuration is highly efficient for capturing the scarce photons available in the bathypelagic and mesopelagic zones, enabling the fish to see in environments where light is extremely limited.
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