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Examples of mutualism, commensalisms and parasitism

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1 mutualism: <ul><li>Acacia species and ant </li></ul><ul><li>Mutualistic interaction between ants and an acacia species (a tree) in the tropics. The ants protect the host tree, while the tree provides the ants with nutrient rich food (the yellow bodies on the tip of leaflets). </li></ul>

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2 commensalisms: <ul><li>The sea cucumber Actinopyga, the swimmer crab is commensally associated receiving transportation and protection. It is often found with the Emperor Shrimp. While the swimmer crab benefits from the relationship, the sea cucumber does not </li></ul>Sea cucumber and crab

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3 parasitism: <ul><li>Most parasites are smaller than their host. This Caribbean soldier fish is the host to the parasitic isopod attached to its head between its eyes. The fish has no way to remove the isopod, which feeds on its body tissue. </li></ul>Soldier fish and isopod