15 Fastest Growing Organisms in the World

11. Sunfish

Kingdom: Animalia

Scientific Name: Mola mola

Growth Rate: 0.82 kg per day

Sunfish ranks 11th in our list of the fastest growing organisms. The creature is extremely heavy, and can weigh up to 1,000 kg when it has reached adulthood. In fact, it has been declared as one of the heaviest known bony fishes in the world, with the highest recorded weight of a sunfish being 2,300 kg. That’s almost double the weight of a midsize car, which has an average recorded weight of 1,524 kg. Along with their heavy body, sunfish are known to grow at vey fast rates as well.  In the engaging memoir “A fascination for fish: adventures of an underwater pioneer”, the author David Powell describes an experience in which a captive sunfish gained approximately 400 kg in just 15 months.

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