Ashtamudi Kayal is a freshwater lake in Kollam, Kerala. Ashtamudi means ‘eight branches’ since this lake has eight branches in all. One of the largest wetland eco systems of Kerala, this picturesque spot has been designated as a Ramsar Site. This wetland supports around 43 marshy and mangrove species, 57 species of birds, 97 species of fishes and some unique copepod species.