Shop › Gigas tridacna clam Gigas tridacna clam Sale Price: $229.99 Original Price: $329.99 2.5-3”+ not WYSIWYG but you will recieve a medium sized healthy gigas clam. 2.5-3”+ not WYSIWYG but you will recieve a medium sized healthy gigas clam. Quantity: Add To Cart Added!