Spot the Symbiotes
Clownfish/AnemonesMutualism Sea anemones sting most  fish. But not clownfish!  Mucus on clownfish skin  protects it from the stings.  These orange swimmers  shelter among anemone  tentacles. In return,  clownfish help lure prey for  the anemone. The anemone  also takes in nutrients from  clownfish waste. 
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Parasitism: Two creatures interact, but one harms the other.
When different species live in close contact and interact with each other, it’s called symbiosis. Symbiosis comes in three main types:
Mutualism: Two creatures interact, and both benefit.
Commensalism:  Two creatures interact. One benefits and the other goes unaffected.
Match the pairs below to see symbiosis in action!
First, click on a photo on the left side of the page.Then find the symbiotic partner on the right side.
Ants/AphidsMutualism Aphids eat plant  sap and create a  substance called  honeydew. Ants  love this sweet,  nutritious liquid.  They love it so  much that they  protect aphids from  predators! They  might even move  aphid eggs to better  leaf-eating areas.
An ant feeds  on honeydew from an aphid. Photo by Jmalik/CC 3.0
Water Buffalo/ Cattle Egrets Mutualism Cattle egrets love to  peck up bugs. Bugs  love to bite water  buffalos. Cattle egrets  gobble the pesky  pests. The water  buffalo gets relief.  The egret gets a  well-earned meal!
Vultures/LionsCommensalism Lions roam the  African savanna  for prey. When  they leave scraps  behind, vultures  swoop in for the  leftovers. This  doesn’t benefit or  harm the lions. But  vultures depend  on these larger  predators for food!
Whales/Barnacles Commensalism Many whales eat  plankton. So do  barnacles. But  barnacles can’t  swim. By latching  on to whales, they  get a free ride to  dinner. The whales  don’t seem to mind  the company!
Human/Tick Parasitism Here’s an unwelcome  surprise after a nature  hike. You find a tick  stuck to your skin!  These tiny parasites  attach to bigger  creatures, like dogs,  deer, and humans.  They feed on blood.  Sometimes ticks  spread dangerous  diseases.
First, click on an photo on the left side of the page.Then find the symbiotic partner on the right side.