Hylkikyitä

Hylkikyitä refers to a group of marine invertebrates found in the Baltic Sea. These creatures are commonly known as sea squirts or tunicates. They are filter feeders, meaning they strain small organisms and organic particles from the water for sustenance. Hylkikyitä are sessile as adults, attaching themselves to hard surfaces like rocks, buoys, and ship hulls. Their larval stage is free-swimming, allowing for dispersal.

The distribution of Hylkikyitä is primarily concentrated in the Baltic Sea, particularly in areas with brackish water conditions. These environments present unique challenges for marine life due to lower salinity compared to typical ocean waters. Some species of Hylkikyitä are native to the Baltic, while others are considered invasive, having been introduced through ship ballast water or other human activities. The presence of invasive species can sometimes impact native ecosystems by competing for resources or altering habitat.

Ecologically, Hylkikyitä play a role in the Baltic Sea's food web and water filtration. They are prey for certain fish and invertebrates, and their filtering activity can contribute to water clarity. Research into Hylkikyitä populations in the Baltic Sea often focuses on their distribution, abundance, and the ecological effects of both native and introduced species. Understanding these populations is important for monitoring the health of the Baltic Sea ecosystem.