Siamese fighting fish: colours, rivalry and remarkable adaptations The spectacular colours and fin shapes of domestic Siamese fighting fish are the result of generations of selective breeding. Read more
Boa c. imperator size: How big can it grow? Boa constrictor imperator usually grows to around 2 meters in length, with a weight ranging between 6–14 kg. Read more
The master of regeneration Mexican axolotl regeneration allows this unique amphibian to regrow lost body parts and repair certain damaged tissues. Read more
