Sea turtle swimming sun rays

A sea turtle swims under sun rays that penetrate the ocean surface, a phenomenon highlighting the importance of light for navigation and feeding of these reptiles.

About this subject

Sea turtles are reptiles that have inhabited the oceans for over 100 million years. There are seven species worldwide, all threatened with extinction. The sun rays penetrating the sea surface create a visual spectacle but also play a crucial role in the behavior of these animals. Sunlight aids in navigation during migration, thermoregulation, and locating food such as jellyfish and algae.

When sunlight hits the water, it refracts and reaches different depths. For sea turtles, brightness can indicate shallower waters or the presence of schools of fish. Additionally, light influences the nesting cycle, as females typically seek moonlit beaches to lay their eggs. In coral reef regions, sunlight is essential for photosynthesis of the algae that some individuals feed on.

Unfortunately, light pollution along coastlines disorients hatchlings, which follow artificial lights instead of the moon's reflection on the sea, leading to exhaustion or predation. Conservation of these animals depends on reducing threats such as accidental capture in fishing nets, plastic ingestion, and habitat destruction. Documenting sea turtles in their natural environment, like the scene captured, helps raise awareness of the need to protect these fascinating creatures.

Frequently Asked Questions

Why do sea turtles swim near the surface?

They surface to breathe and also to bask in the sun. The surface provides more light, which helps with navigation and hunting prey like jellyfish.

How does sunlight affect sea turtle nesting?

Females prefer beaches with natural light, such as the moon's reflection on the sea. Artificial light can disorient them and sometimes cause nest abandonment.

How many sea turtle species exist and which is the most common?

There are seven species. The green sea turtle (Chelonia mydas) is one of the most common in tropical regions, known for feeding on algae.