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Grammistes macrophthalmus

Grammistes macrophthalmus

Grammistes macrophthalmusAI-generated illustration

Grammistes macrophthalmus, commonly known as the mottled grouper, is a vibrant reef-dwelling predator found throughout the Indo‑Pacific. It grows to about 40 cm (15.7 in) and is prized by spearfishers for its striking coloration, though its flesh can carry ciguatera toxins, making it unsuitable for regular consumption.

Fight
Taste
Inedible/Protected
Game Fish

Basic Information

Family

Serranidae

Max Size

40 cm (15.7 in) – up to ~1.5 kg (3.3 lb)

Habitat

Coral and rocky reefs, 5‑30 m depth in tropical Indo‑Pacific waters

Best Season

Year‑round in tropical waters, with peak activity in spring and summer months

Best Time

Early morning or late afternoon when reefs are most active

Distribution

No distribution map available

Fishing Tips for Grammistes macrophthalmus

  • Use light to medium spinning gear to feel subtle takes
  • Target areas with abundant structure such as ledges and overhangs
  • Employ live shrimp or small baitfish on a small jig or soft plastic lure
  • Retrieve slowly with occasional pauses to let the lure sink and provoke a strike

Top Fishing Locations for Grammistes macrophthalmus

Heron Island, Great Barrier Reef

Australia
intermediate85% Very Common

World‑class reef with abundant tubemouth populations; easy access from mainland and excellent underwater visibility.

Best: September to November

North West Ridge, Christmas Island

Australia
expert78% Very Common

Remote volcanic seamount renowned for high densities of Grammistes macrophthalmus; requires liveaboard charter.

Best: April to June

Ari Atoll, Maldives

Maldives
beginner80% Very Common

Clear lagoon reefs with thriving reef fish communities; popular with dive‑and‑fish tours.

Best: January to March

Blue Corner, Palau

Palau
intermediate70% Very Common

Iconic drop‑off wall where tubemouth hide among crevices; strong currents attract large schools.

Best: June to August

Ras Mohammed National Park, Egypt

Egypt
beginner75% Very Common

Red Sea reef with steep drop‑offs and abundant baitfish, making tubemouth readily available.

Best: October to December

Tubbataha Reefs Natural Park, Philippines

Philippines
expert85% Very Common

UNESCO‑listed marine sanctuary with pristine coral heads; tubemouth are plentiful during peak spawning.

Best: March to May

Market Prices

Recommended Fishing Equipment for Grammistes macrophthalmus

Recommended Equipment

RodMedium‑light spinning rod, 6‑7 ft, fast action
Line8‑12 lb test monofilament or fluorocarbon
Lure TypeSmall soft‑plastic grubs, bucktail jigs, or tiny spoon lures
TechniqueBottom jigging and slow‑retrieve casting near reef structure

Best bait: Live shrimp, small sardines, or other reef baitfish