Abstract
A survey was carried out at Parakkai Freshwater Lake, Kanyakumari, Tamil Nadu, India (8.1519°N; 77.4544°E) to study the freshwater fish biodiversity. The survey manifested the invasion of South American Armored Suckermouth catfish (Pterygoplichthys disjunctivus) native to Madeira River basin of South America province to the lake. The invasions of this non-native catfish to many parts of the native waters were already reported by many ichthyologists. However, no such detailed data available for the occurrence of this non-native catfish and its negative effect on the native freshwater fish biodiversity of Kanyakumari, a part of Southern Western Ghats region of India. The present paper records the occurrence of P. disjunctivus, a non-native invasive catfish to the natural waters of Kanyakumari. In addition, the potential impact of this non-native invasive catfish on the native aquatic biodiversity is pertinently discussed in this report.
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