Vélelles - 10 things to know with detail
- 1. Velella is a genus of free-floating hydrozoans that are commonly known as "by-the-wind sailors." They are found in oceans around the world and are often seen washed up on beaches.
- 2. Velella have a distinctive sail-like structure on their bodies that allows them to catch the wind and float on the surface of the water. This helps them to move and feed in the open ocean.
- 3. Despite their appearance, velella are not single organisms but rather a colony of specialized individuals called zooids. These zooids work together to perform different functions, such as feeding, reproduction, and buoyancy control.
- 4. Velella feed on plankton and other small organisms by using their tentacles to capture prey. They also have stinging cells called nematocysts that help them to subdue their prey.
- 5. Velella reproduce sexually, with males and females releasing eggs and sperm into the water. Fertilization occurs externally, and the resulting larvae eventually settle and develop into new colonies.
- 6. Velella are typically found in warm, tropical waters, although they can also be found in temperate and cold waters. They are most commonly seen in the open ocean, but strong winds and currents can sometimes wash them ashore in large numbers.
- 7. Velella play an important role in marine ecosystems as a food source for predators such as sea turtles, fish, and seabirds. They also help to cycle nutrients through the water column.
- 8. Velella have a relatively short lifespan, typically living for only a few months. During this time, they can travel long distances across the ocean, driven by the wind and currents.
- 9. Velella are not harmful to humans, although their nematocysts can cause a mild sting if touched. It is always best to avoid handling them with bare hands to prevent any potential irritation.
- 10. Climate change and ocean pollution are threats to velella populations, as they rely on stable ocean conditions for their survival. Conservation efforts are being made to protect these fascinating creatures and the delicate ecosystems they inhabit.