Zebra Sturgeon - (Acipennser Gueldennstaedtii)
 
Maximum size is 2 meters long.
The lifespan of the Russian Sturgeon is 60+ years.
A variation of the Diamond Back, commonly known as a Zebra Sturgeon.
The obvious diffence being the colour due to the bone and cartilage structure taking on a pure white colouration. Absolutely beautiful, and why it deserves its own subcategory.