i went on a spearing holiday to merimbula last year and dived the top lake there,whilst there i came across a strange fish which looked alot like a catfish it had a eel like tail and dark blotches on it it looked very simalar to the freashwater tandanus catfish just wanted to know if anyone knew what they are how big they grow etc.

Estuary catfish.

Bandwidth and image stolen from http://www.underwater.com.au/image.php/id/6570/

thats the one thanks for that greg much appreciated

Aw and he respects copyrights to some extent, what a gentlemen.