The pearlside (Maurolicus muelleri) is a common fish on the Chatham Rise. Vulnerable to predators, they hide in the dark mesopelagic zone during daylight, then with many other organisms they move several hundred metres up to the euphotic layer, where food is more abundant. Echo sounder surveys from the research vessel Tangaroa discovered this phenomenon in the late 1990s. The sounders picked up a ‘false sea floor’, which was actually the echo from the swim bladders of the numerous pearlsides, moving towards the surface at night.
Te whakamahi i tēnei tūemi
Fathom Digital Graphics
Artwork by David Batson
This item has been provided for private study purposes (such as school projects, family and local history research) and any published reproduction (print or electronic) may infringe copyright law. It is the responsibility of the user of any material to obtain clearance from the copyright holder.