Despite comprising only 2.2% of the area of the Northern Territory, estuaries are major repositories of biodiversity; 40% of all fishes recorded from the Northern Territory occur in estuaries and 33% of all northern Australian freshwater fishes require access to estuaries to breed. Estuaries are vital nursery areas for many fish species including many that are of economic importance. Importantl...

The family Rivulidae is one of the largest families of freshwater fishes of the Neotropical region [1]. It is a diverse group of annual fish, most popularly known as “killifish”, which occurs in seasonal freshwater swamps of tropical and subtropical areas of South America [2]. Brazil has the greatest diversity of the family Rivulidae and is represented by 30 genera with approximately 120 fish s...