Symbiosis practice Fort Lee High School

Some shrimp and crab live and find food through sea anemone that do not benefit from either organism

• Mutualism

• Parasitism

• Commensalism

A pearl-fish spends the day inside the intestines of a sea cucumber. The fish emerges from the sea cucumber at night to feed on small crustaceans while the sea cucumber sees no benefit from the pearl-fish

• Commensalism

• Parasitism

• Mutualism

An isopod lives inside the mouth of a snapper fish. The isopod breaks blood vessels in the fish's tongue, causing the tongue to degenerate. The isopod then hooks its legs to the fish's tongue, essentially replacing it. It stays there for the rest of its life, feeding on blood, mucus, and leftover pieces of food while the fish suffers

• Commensalism

• Parasitism

• Mutualism

A boxer crab carries a small pair of anemone in its claws. When a predator approaches, the crab waves the stinging tentacles of the anemones to scare the predator away. While the crab uses the anemone for protection, the anemone feed off of small food particles dropped by the crab during feeding. (+, +)

• Mutualism

• Parasitism

• Commensalism

A tapeworm needs to eat food that is already digested, so it lives in the intestines of a dogfish shark and gets nourishment from the shark. As a result of the tapeworm infestation, the shark is weakened and more vulnerable to disease

• Mutualism

• Commensalism

• Parasitism

A tube worm found at deep-sea hydrothermal vents and cold seeps, has no digestive tract (stomach + intestines). It relies on bacteria that live in its tissues. The bacteria develop hydrogen sulfide or methane for the worm to use as fuel while the bacteria receive shelter from the worm.

• Mutualism

• Parasitism

• Commensalism