Given the question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Tyrannochromis macrostoma - Tyrannochromis macrostoma or Big-Mouth Hap is a species of cichlid endemic to Lake Malawi where it prefers rocky shallows. This species can reach a length of 30 centimetres (12 in) TL. It can also be found in the aquarium trade.
The answer is:
Animal