Adults occur in rock pools and subtidal areas. They are found at exposed sites, usually near darker overhangs and walls among encrusting organisms . Eggs are hemispherical and covered with numerous sticky threads that anchor them in the algae on the nesting sites . Larvae are planktonic which occur primarily in shallow, nearshore waters .
Physical description for Yaldwyn's triplefin is currently being compiled.
Behavioural data for Yaldwyn's triplefin is currently being reviewed.
Marine; demersal; depth range 0 - 20 m . Temperate; 13°C - ? Southwest Pacific: around mainland New Zealand.
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