Bryozoa Official
: They possess a U-shaped digestive tract with both a mouth and an anus. Because the anus is located outside the tentacle crown, they are also known as Ectoprocta ("outside anus").
Bryozoan colonies are made up of individual units called . These zooids are typically less than 1 millimeter long and cooperate to ensure the colony's survival. bryozoa
: These species often form large, jelly-like masses that can grow to the size of a football. Finding them in a pond or lake is often a sign of good water quality , as they help clear the water by filtering silt and clay. Bryozoans (Moss Animals) : They possess a U-shaped digestive tract with
: Most species live in the ocean, ranging from tropical coral reefs to polar waters and even deep-ocean trenches. They often encrust rocks, shells, and kelp. These zooids are typically less than 1 millimeter
, commonly known as "moss animals," are a phylum of microscopic aquatic invertebrates that live in sedentary colonies. While they are often mistaken for coral, seaweed, or even gelatinous "blobs," they are a distinct group of filter-feeders found in both marine and freshwater environments. Biological Structure and Anatomy
: Zooids secrete a protective chamber called a zooecium, which can be gelatinous, chitinous (like insect shells), or calcified (like coral).