Nassau Grouper

{
  "id": "8787cb05-3ab4-4780-8a2d-3955f76d249f",
  "commonName": "Nassau Grouper",
  "scientificName": "Epinephelus striatus",
  "slug": "nassau-grouper",
  "category": "saltwater",
  "aliases": [
    "Hamlet",
    "Rockfish (regional Caribbean)",
    "Brown Grouper",
    "Gag (note: this can cause confusion with *Mycteroperca microlepis* in some areas)",
    "Sea Bass (in some older or local contexts)"
  ],
  "description": "The Nassau Grouper is a quintessential reef predator, instantly recognizable by its robust, slab-sided body designed for ambush. Mature fish typically range from 20 to 30 inches and weigh up to 55 pounds, though the average catch is notably smaller. Its key identifying features include a distinct, prominent dark band (or saddle) on the base of its tail, a dark band running from its eyes to the dorsal fin, and a striking dark moustache mark above the upper lip. Its coloration is a mutable masterpiece of camouflage, shifting from pale, sandy tones over light bottoms to deep reddish-brown over dark reef, often adorned with vertical, irregular lighter bars across its flanks. In hand, its powerful jaws and thick, muscular shoulders reveal its nature.",
  "imageUrl": "https://media.meridiaoutdoors.com/media/species/nassau-grouper/main.webp",
  "hero": {
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    "altText": "Nassau Grouper (Epinephelus striatus) watercolor",
    "caption": "The Nassau Grouper is a quintessential reef predator, instantly recognizable by its robust, slab-sided body designed for ambush.",
    "width": 2400,
    "height": 1340
  },
  "phases": [
    {
      "id": "2d8c59cc-5714-4c48-acf4-d01e74b0d8ef",
      "name": "Adult",
      "slug": "adult",
      "description": "The Nassau Grouper is a stealthy reef ambusher, spending its adult life patrolling coral heads, ledges, and caves. It’s a solitary predator, using its remarkable camouflage to blend into the reef before engulfing unsuspecting prey with a powerful vacuum-like gulp. This phase dominates most of its life cycle, with individuals often holding tight to specific home territories.",
      "appearance": "Robust, slab-sided body with a large mouth and thick, muscular shoulders. Base coloration is highly mutable, shifting from pale sandy-beige over light substrates to deep reddish-brown or olive-brown over dark reefs. Always displays five distinct dark markings: a prominent dark saddle on the tail base, a dark band running diagonally from the eye through the upper gill cover to the dorsal fin, a dark 'moustache' stripe above the upper lip, and two smaller dark spots at the base of the dorsal fin near the head. Irregular, vertical, lighter bars often appear on its flanks, especially when agitated. Fins are generally dusky, matching the body color. Size ranges from 20 to 30 inches on average, up to 55 pounds.",
      "triggers": null,
      "habitat": "Shallow to moderate-depth coral and rocky reefs, ledges, caves, and patch reefs in tropical western Atlantic waters.",
      "anglersNote": "This is the primary phase anglers target, offering a powerful fight close to structure. Due to severe population declines, catch-and-release or strict local regulations are often in effect.",
      "displayOrder": 0,
      "imageUrl": null,
      "media": null
    },
    {
      "id": "3ed64a8c-6529-46dc-9b6b-225655cc7a39",
      "name": "Spawning Aggregation Coloration",
      "slug": "spawning-aggregation-coloration",
      "description": "During full moon periods in winter months, Nassau Groupers undertake a remarkable migration to specific, traditional spawning sites. Here, they gather in massive aggregations of hundreds to thousands of fish. In this brief phase, their coloration undergoes a dramatic transformation, believed to play a role in courtship and spawning coordination within the dense group.",
      "appearance": "Body undergoes a stark, high-contrast change. The normal mutable background color is replaced by a bold, pale whitish or beige base. Against this light background, the five characteristic dark markings (tail saddle, eye band, moustache, and two dorsal spots) become intensely black and starkly defined. A wide, distinctive black band often appears horizontally along the midline, bifurcating the body. The head frequently turns a dark, smoky gray or blackish hue, creating a dramatic 'bicolor' effect with the pale body.",
      "triggers": "Triggered by lunar cycles (full moons) and water temperature cues in winter months, leading to migration to specific deep-water spawning aggregation sites.",
      "habitat": "Deep reef promontories or specific offshore sites where large, traditional spawning aggregations form.",
      "anglersNote": "Anglers should avoid targeting fish at known spawning aggregations, as this is a critically vulnerable period for the species. Fishing is typically prohibited at these sites and times.",
      "displayOrder": 1,
      "imageUrl": null,
      "media": null
    }
  ],
  "contentUpdatedAt": "2026-05-09T22:31:37.590Z"
}

[]

[]

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  "description": "Nassau Grouper identification: robust reef predator with distinct tail band and moustache mark. Powerful ambush hunter of tropical western Atlantic reefs.",
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    "hamlet",
    "rockfish (regional caribbean)",
    "brown grouper",
    "gag (note: this can cause confusion with *mycteroperca microlepis* in some areas)",
    "sea bass (in some older or local contexts)"
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