What type of symbiotic relationship does a spider crab and algae have?

The algae lives on the crabs and this provides the crabs with a camouflage and gives the algae a place to live so this is beneficiary to both. In other words Spider crabs and Algae are Mutualism to eachothe.

Explanation:

nanotechnology is a powerful tool in biomaterials research as it creates numerous possibilities for the engineering of functional molecules. nano-bio refers to projected ability to incorporate biomimicry into various materials at nanoscale.  

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.