Natural Barriers

This is an important positive message about fish passage. We are seeing an increase in the use of the term “natural barrier”, particularly when prioritizing remediation of man-made structures/barriers. As it happens, many species of fish have evolved to...

Amazing Climbing Koaro

This is a short video by Tim Olley showing larger bodied koaro (Galaxias brevipinnis) “climbing” up a natural feature. Larger bodied fish tend to use a burst swimming action unlike the juveniles that typically...

Climbing Eels

This rare footage shows both small and larger eels trying to navigate a natural feature. You will see that larger bodied specimens are unable to utilise the wet margins or splash zones. Remediation techniques should offer a range of options to give migrating fish...

Saxton Creek

Tim Olley has shared his experiences and observations made while rectifying a failed fish pass in Nelson NZ. Failed fish pass. Click here to read a short but fascinating report describing how a failed fish-pass was successfully remediated. [Saxton creek lessons...