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Pacific Goliath Grouper

Epinephelus quinquefasciatus

An underwater photograph of a massive Pacific Goliath Grouper hovering in the dark water of a deep rocky crevice, displaying its huge head, mottled grey-green skin, and thick lips.

Adult

Family: Sea Basses & Groupers (Serranidae)
Size: Up to 250 cm (98 in)
Depth: 1 – 100m (3 – 330ft)

Distribution: Eastern Tropical Pacific (Baja California to Peru, including Malpelo and Cocos Islands).

Identification: The undisputed giant of the Eastern Pacific reef.

  • Massive Proportions: Features a robust, thick-set body, a wide flat head, and a remarkably large mouth capable of inhaling prey whole.
  • Mottled Coloration: The body is greyish-green to tawny brown, covered in irregular pale blotches and small dark spots.
  • Rounded Fins: Possesses large, distinctly rounded pectoral and caudal (tail) fins built for ambush bursts.

Behavior: A territorial giant with a fascinating life cycle.

  • Habitat Shift: Juveniles rely heavily on shallow mangroves and estuaries for protection before migrating to deeper, offshore rocky reefs and wrecks as adults.
  • Booming Warnings: Highly territorial, they often warn away divers or rivals by creating a loud, low-frequency "booming" sound using their swim bladders.

You just learned about this fish...

NOW COME SEE IT!

Fun Dive Cover page in Bahia Solano
Fun Dive Cover page in Bahia Solano
Fun Dive Cover page in Bahia Solano

Behind the Lens

Jalvan

Underwater Photographer & Instructor

Documenting unique marine biodiversity from the Red Sea across the Pacific Ocean. Dedicated to creating a visual catalog of Bahia Solano's marine life for conservation and research.

Photography: Sony A7C II | Olympus EPL10
Video: Osmo Action 5 Pro | GoPro

Follow my work:

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REFERENCES & DATA SOURCES

  • Scientific ID: Verified via FishBase (Froese & Pauly) & Regional Eastern Pacific data.
  • Field Guide: Reef Fish Identification: Baja to Panama (Humann & DeLoach).
  • Conservation Status: IUCN Red List (Least Concern).
  • Regional Data: Ankla Azul Marine Observation Log (Bahia Solano).

More Than Kicking Your Fins

At Ankla Azul, diving is more than kicking your fins. It's patient teaching, sharp safety, and real care for the place we call home. As an SSI Instructor Training Center and an SSI Blue Oceans Center (2025 award), we blend skill-building with ocean awareness—Fish ID, coral nursery work, community education, and rescue support—so every dive grows confidence and respect for Bahía Solano's wild Pacific.