Mutualism, Commensalism, Parasitism
The hermit crab will find an empty snail shell and occupy it. If it outgrows it, it will find another.
Commensalism
Bacteria
Decomposer
All living organisms and their environment
ecosystem
Pilot fish usually swim near sharks or whales . They feel protected and get the benefit of eating leftovers from the sharks' meals.
Commensalism
Whale
Consumer
Each living member in an ecosystem
individual
Sea anemones have stinging tentacles. Clownfish are not harmed by the tentacles but live among the tentacles. The clownfish gets food when other fish are torn up by the tentacles. The sea anemone is protected from predators that the clownfish chases away.
Mutualism
Spinach
Producer
An organism's specific job
niche
Ticks attach to the skin of dogs and other furry creatures and suck blood. They drop off to digest the meal and later find another host to attach to
Parasitism
Fungus
Decomposer
A place to live
habitat
Mistletoe, a green sprig, grows on oak trees. It will obtain support and food from the tree. Trees with lots of mistletoe growing on them are often weakened by the mistletoe
Parasitism
Lion
Consumer
All the species that live in a particular ecosystem
community