Middle School Life Science Question of the Day

Daily challenge for Middle School Life Science. Test yourself and track progress.

A pearlfish spends the day inside the alimentary tract, or intestines, of a sea cucumber. The fish emerges from the sea cucumber at night to feed on small crustaceans. The pearlfish gets a safe place to live. The sea cucumber does not gain anything from the relationship, nor is it harmed. This is an example of which type of symbiotic relationship?

Select an answer and click Check.