A Data Deficient (DD) species is one which has been categorized by the International Union for Conservation of Nature (IUCN) as not enough data to make an assessment of its risk of extinction. According to IUCN Bangladesh (2015a, b) two
Data Deficient (DD) Freshwater Fishes of Bangladesh
![Data Deficient (DD) Freshwater Fishes of Bangladesh Barred baril, Barilius barila](https://en.bdfish.org/wp-content/uploads/2011/07/barilius-barila.jpg)