How to Measure Fish and Invertebrates
 | Fish Measure fork length, the straight-line distance from tip of snout to middle of trailing edge of tail |
 | Ula (spiny lobster) Measure carapace length, the distance from ridge between two largest spines above eyes to rear edge of carapace |
 | Ula pāpapa (slipper lobster) Measure tail width between first and second abdominal segments |
 | Pāpa‘i kualoa (Kona crab) Measure length of carapace in straight line from rostrum to middle of trailing edge of carapace |
 | Samoan crab Measure width of carapace at widest point |
 | Pāpa‘i kūhonu (kuahonu, white or "haole" crab) Measure length or width of carapace at widest point, as shown above for Kona and Samoan crabs |
 | ‘Opihi Measure longest distance across shell |