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Nautical Trivia

February 3, 2017

1. Did you know that oysters are invertebrate sea creatures, which means they don’t have a backbone? 

 

2. Did you know that oysters are also bivalves; they have two shells, joined by a hinge and they live inside these shells for almost all of their life?

 

3. Did you know that a pearl forms when a foreign object, often a grain of sand, works its way inside the oyster’s shell? This object irritates the oyster, causing the oyster to produce a substance called nacre, which is a mixture of calcium and protein. Over time, nacre builds up and, years later a pearl is formed.

 

4. Did you know that oysters breathe in a manner similar to fish, using gills and a mantle? The oyster’s mantle contains blood vessels that have thin walls. The oyster “breathes in” oxygen from the water through these walls, and “breathes out” carbon dioxide. The oyster’s heart, which is small and only has three chambers, then pumps the oxygen enriched blood through its body.

 

5. Did you know that Oysters are high in calcium, iron, and protein? Admittedly, they’re not for everyone, but adventurous humans the world over have enjoyed oysters, raw and cooked, for thousands of years. 

 

6. Did you know that any oyster can produce pearls?

 

7. Did you know that there is there is no way of telling male oysters from females by examining their shells?

 

8. Did you know that an oyster’s life span in captivity is up to 20 years?

 

9. Did you know that they are generally whitish-gray in outer shell color, and their inside shell is usually a porcelain white. They have extremely strong adductor muscles to close their shells when threatened.  

 

10. Did you know that Oysters reproduce when the water warms by broadcast spawning, and will change gender once or more during their lifetime?

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