Two of the most common ones (sexual side effects and weight gain) are serious enough to cause people to stop or change antidepressant medications. Here are seven important antidepressant side effects you need to be aware of: Physical Symptoms.hen you first begin antidepressant treatment, depression medication side effects can be physical symptoms like headache, joint pain, muscle aches, nausea, skin rashes, or diarrhea. These symptoms are usually mild and temporary.
Predators & defenses : Many different types of animals prey on adult sea urchins, including birds, sea otters, fishes, crabs, lobsters, octopuses, and sea stars. Eggs and larvae of sea urchins are eaten by many types of carnivorous zooplankters and by suspension-feeding invertebrates including hydroids, sea anemones, and mussels, just to name a few.
The lower half of a sea urchin's body is referred to as the oral surface, because it contains the mouth, while the upper half is the aboral surface. The internal organs are enclosed in a hard shell or  test  composed of fused plates of calcium carbonate covered by a thin dermis and epidermis.ommon colors include black and dull shades of green, olive, brown, purple, blue, and red. Sea urchins move slowly, and feed on mostly algae. Sea otters, starfish, wolf eels, triggerfish, and other predators hunt and feed on sea urchins.