Symplegma
Symplegma is a genus of colonial tunicates in the family Didemnidae. They are commonly known as sea squirts or colonial ascidians. These organisms are filter feeders, drawing water through their bodies to extract food particles. They are typically found in a wide range of marine habitats, often forming colorful and intricate colonies on rocks, seaweeds, and other substrates.
Characteristics
Symplegma species are characterized by their colonial nature, with individuals forming interconnected groups known as zooids. Each zooid has a distinct body plan, with an incurrent siphon for drawing water in and an excurrent siphon for expelling waste. The zooids are typically embedded in a common tunic, which is a tough, leathery outer covering that protects the colony. The tunic can vary in color and texture depending on the species, ranging from translucent to opaque and smooth to bumpy.
Environments
Symplegma species are found in various marine environments, including:
- Intertidal zones
- Subtidal reefs
- Seagrass meadows
- Mangrove forests
They are often found in areas with moderate water flow and ample food sources. Symplegma colonies can be found from shallow depths to deeper waters.
References