Yeah it's pretty cool. Negligible senescence has been found in many animals, including turtles, alligators, whales, flounder, rockfish, lobsters, sturgeon, sharks, and many other fish and reptiles and simpler organisms. They really only succumb to environmental factors such as disease and predators, but show no real signs of aging. Another cool thing is that a lot of these animals don't even appear to have a limited body size, but continue to grow as they age.