course hero why are the coral shown in this photograph white?

Why do corals change color during bleaching?

Feb 03, 2016 · Why are the coral shown in this photograph white? A.These corals have contracted a fungal disease. B.These corals have lost their zooxanthellae. C.These corals have been overgrazed by predators. D.All of the coral polyps are open and gathering food. Answer Key: B

What is the difference between white and pink coral?

Oct 09, 2016 · Why are the coral shown in this photograph white? A.These corals have contracted a fungal disease. B.These corals have lost their zooxanthellae. C.All of the coral polyps are open and gathering food. D.These corals have been overgrazed by predators. Answer Key: B

What are the different colors of coral?

Sep 10, 2015 · Feedback: Section 11.3 Human Impacts on the Ocean Figure 11.11 pg. 283 Question 23 of 25 4.0/ 4.0 Points Why are the coral shown in this photograph white? A.All of the coral polyps are open and gathering food. B.These corals have been overgrazed by predators. C.These corals have contracted a fungal disease.

What's killing the corals?

Oct 07, 2014 · Feedback: Section 11.3 Human Impacts on the Ocean Figure 11.11 pg. 283 Question 23 of 25 0.0/ 4.0 Points GraphicWhy are the coral shown in this photograph white? A.These corals have contracted a fungal disease. B.These corals have lost their zooxanthellae. C.All of the coral polyps are open and gathering food.

Why do corals bleach?

But environmental stress — high temperatures, in particular — can kill corals by causing them to "bleach," a process in which they lose their vital algal friends and turn ghostly white.

Why are coral reefs in decline?

But coral reefs around the world are in decline due to a number of different issues, including overfishing, water pollution and coastal development.

What is white coral used for?

White coral. White coral is quite common and is mostly used in beads or put on display in its raw form. Large amounts of white coral is dyed to improve its looks or imitate more expensive coral varieties.

What are the colors of coral?

Natural coral comes in a large variety of colors: red, orange, pink, blue, white and black. Discoloration further increases the number of colors naturally available. Dyed coral can of course be any color you want. Though most people prefer a natural color. The most common natural colors are listed below with additional information on rarity ...

Is salmon pink coral worth it?

Salmon pink coral usually is worth more, owing to its rarity and better looks.

Is black coral rare?

As the name refers to the dark brown to black color of its skeleton, not the overall color. Black coral is very rare and is on many lists of endangered species. It is the state gemstone of Hawaii.