Zebrafish

Danio rerio

The zebrafish (Danio rerio) is a small freshwater fish species native to the slow-moving streams, canals, and rice fields of South Asia, particularly in countries like India, Bangladesh, and Nepal. Characterized by its striking appearance, the zebrafish showcases a series of horizontal blue and silver stripes extending from its gills to the tail, which make it a favorite among aquarium enthusiasts. Adult zebrafish typically grow to about 2.5 to 4 centimeters in length.

This species is highly valued in scientific research due to its genetic similarity to humans, ease of care, and transparent embryos, which allow for direct observation of developmental processes. Zebrafish are known for their remarkable regenerative capabilities, particularly in regard to their heart and fin tissues, making them key subjects in studies aimed at understanding tissue regeneration and disease.

Zebrafish are social animals, often found swimming in large shoals. They thrive in a habitat range with temperatures from 24 to 28 degrees Celsius and a pH between 6.5 and 7.5. Their diet in the wild consists mainly of small invertebrates and plankton, while in captivity, they are typically fed flakes or pellets designed for tropical fish. Overall, zebrafish are not just popular in the aquarium trade but also serve as a pivotal model organism in scientific research.