Roi — Peacock Grouper (Cephalopholis argus) in Hawaii

Roi

Peacock Grouper · Cephalopholis argus
INVASIVE · REMOVAL ENCOURAGED
What is a Roi? Roi is the Hawaiian name for the peacock grouper (Cephalopholis argus), an introduced species targeted by spearfishers to protect native Hawaiian reefs. It inhabits coral reef, rocky reef, caves and overhangs at 5–60 ft around the Big Island, and is never eaten due to ciguatera risk.
Depth5–60 ft
SeasonYear-round
DifficultyBeginner
CiguateraMedium

About the Roi

An invasive species introduced to Hawaii in the 1950s. Roi are aggressive predators that have devastated native reef fish populations. Spearfishing Roi is actively encouraged by DLNR as part of invasive species management. Good eating — firm white flesh.

How we hunt them

Roi are found in caves, under ledges, and around coral heads. They are relatively easy to approach and make excellent targets for beginners. Look for their distinctive blue-spotted pattern. They often hold still when approached slowly.

Rules & regulations

INVASIVE SPECIES — no size or bag limit. Spearfishing Roi is encouraged to help protect native reef ecosystems. Do not release back into the water.

Source: DLNR DAR · Verified July 2026 · Always confirm current rules with Hawaiʻi DLNR

Non-residents age 15+ also need the Hawaiʻi nonresident marine fishing license (HAR 13-74-11) — buy online or see our regulations guide.

Hunt Roi with a guide

Every Top Shot Spearfishing dive covers species ID, regulations, and technique — beginners welcome.

Group Dive — $299Private Dive — $449+