Question

Which of the following is an edible Oyster?
A)Pecten
B)Spondylus
C)Pinctada
D)Solen

Answer 1

Hint It is a bivalve Molluscs species generally found around the Atlantic coast of North America which is distributed from North Carolina to Brazil. It can grow up to 10 centimeters in diameter and can be eaten.

Complete answer:
-Spondylus is a large and thick bivalve Mollusca and usually has spines and found attached and preferential has a hinge. It belongs to the family Spondylidae.
-The other name of Spondylus is thorny oysters, spiny oysters, and spondylitis. The meat of the Spondylus bivalve is edible and as Scallops they are a group in the same superfamily.
-Spondylus is not closely related to true oysters of the family Ostreidae. They are not limited to only rocks and can be found attached by a byssus.
-The shells of the Spondylus are collected by the collectors and are used for commercial markets for their livelihood.

Additional information
Pecten- It belongs to the family Pectinidae and is a genus of large scallops or saltwater clams. These Marine bivalve mollusks. From the Cretaceous period to the Quaternary period, this genus is known in the Fossil records and the records of their Fossil cells within this genus have been found all over the world.
Pinctada- It belongs to the family Pteriidae and genus of saltwater Oysters. These are also the Marine bivalve mollusks and known as pearl oysters. Their inner shell is composed of nacre, which is very strong. Pinctada is also known as "mother of pearl".
Solen- Its common name is grooved razor shell and belongs to the family Solenidae. It is a species of marine bivalve animals.

So, the correct answer is, "Spondylus"

Note:
-"Thorny oyster" or 'spiny oyster' is the other name of Spondylus. These are generally found in the warm water of most of the oceans of the world and are bivalve molluscs.
-These are the filter feeders. Adult Spondylus found attached to the hard substrate. They share this characteristic by convergent evolution with true oysters and jewel boxes.
-They protected themselves by the spines and the layer of epibionts and can produce pearls.