When sea turtle hatchlings emerge from their nests, typically at night, they crawl toward the ocean in what is known as “seafinding.” They have to discriminate between the brighter seaward versus a dimmer landward horizon and then move toward the source of the light. That difference in radiance between opposing horizons enables them to find the ocean even when the uneven surface of the beach precludes a direct view of the sea, at least for a small hatchling.
Click here for original story, Study finds why baby leatherback marine turtles can’t ‘see the sea’
Source: Phys.org