Marine Life Bottle-nosed Dolphin (Tursiops truncatus). Best-known of the dolphin species , it has received much attention on its exploits and intelligence. It lives in pods of approximately 12, but as many as several hundred will be in one area. It enjoys playing, jumping out of the water and splashing. Its total length can measure up to 12 feet, its average weight is 500 pounds and can reach up to 1,430 pounds. It can swim at a speed of up to 14 knots and dive for more than 6 or 7 minutes. Photographer- Paul Ratcliffe Postcard size 4 x 6 Get your Here.