Contents. 1  Inflammatory joint effusion AND Stiff hip: Causes of All Symptoms. 2  Inflammatory joint effusion OR Stiff hip: Causes of Any Symptom. 3  Inflammatory joint effusion: Causes. 4  Inflammatory joint effusion: Introduction. 5  Stiff hip: Causes. 6  Stiff hip: Introduction.
Sardines are an important part of the food chain. Jupiterimages/Photos.com/Getty Images. Sardines live in large schools that may contain thousands of fish. They typically feed on plankton and are close to the bottom of the food chain; many different kinds of predators eat sardines, including humans.
What eats sponges? A: Marine animals, such as hawksbill sea turtles, angelfish, sea slugs, some starfish and the larvae of sponge-flies, feed on sponges. Not many marine animals eat sponges, because multicellular organisms contain less nutrients, are tough to eat and produce chemical toxins as their form of defense.