Question

What is the relationship between water clarity and urchin survival?

Answer 1

Answer:

Sea urchin cannot survive in clear water

Explanation:

The higher the water clarity, the lower/or negligible is the number of urchin found in that particular water body.  

It is so because sea urchins prefer to stay in water bodies with proximity to rock pools and mud. Most commonly they are found on coral reefs of kelp forest or sea grass bed. They prefer to stay in habitat which can provide them food such as algae, sea weed, sea grass etc.  

Answer 2

Sea urchins do not live in clear waters because they provide less nutrients to survive.

Sea urchins are organisms characterized by:

• It has a spherical shape
• Has an external skeleton (carapace)
• It has movable spikes on the shell
• They live in all the seabed, up to 2,500 meters deep

Sea urchins are:

• herbivore: feeds mainly on plants.
• Filter feeder: feeds through systematic and massive filtration of water.
• Detritivores: get their food from decaying detritus or organic matter.

From the above, it can be inferred that the sea urchin cannot survive in clear water because it has a low amount of microorganisms, organic matter, and herbs for its food.

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