How to Measure Fish and Invertebrates

Measurement of FishFish
Measure fork length, the straight-line distance from tip of snout to middle of trailing edge of tail
Measurement of UlaUla (spiny lobster)
Measure carapace length, the distance from ridge between two largest spines above eyes to rear edge of carapace
Measurement of Ula papapaUla pāpapa (slipper lobster)
Measure tail width between first and second abdominal segments
Measurement of Kona crabKona crab
Measure length of carapace in straight line from rostrum to middle of trailing edge of carapace
Measurement of Samoan crabSamoan crab
Measure width of carapace at widest point
Measurement of Kuahonu crabKūhonu crab
Measure length or width of carapace at widest point, as shown above