Goliath Grouper — Sebastian, Florida

Goliath grouper are a resident fish of the Sebastian Inlet jetties, seen in Sebastian Inlet District reports nearly every summer week when snook crowd the north jetty tip.

The Sebastian Inlet District classes the goliath as a resident reef fish, one of the species that spend their lives in the rock around the inlet rather than passing through it. The District's article on that group calls the goliath one of the most obvious and interesting reef fish in the inlet and notes that the jetties and the 3,120-foot inlet channel are armored with granite and coquina rock. That rock is what gives a fish of several hundred pounds a place to hide in a channel that would otherwise be open sand between Brevard and Indian River counties.

The same District article describes Sebastian Inlet goliaths as fairly residential except during a full moon in August or September, when they migrate offshore to spawn. It puts them at 400 to 500 pounds and about six feet in length, and describes them as harmless to people. FWC lists the species at up to 8 feet and 800 pounds, the largest grouper in western Atlantic waters, and says it is more abundant in southern than in northern Florida waters, which puts Sebastian Inlet near the northern edge of the range where goliaths are common.

Young goliath start inside the lagoon. Part One of the District biology series says goliath groupers appear to settle more in mangroves as juveniles in the Indian River Lagoon, and the FWC species profile says young goliath often occur in estuaries around mangroves and manmade structures such as bridges, docks and artificial reefs. The Sebastian Inlet bridge pilings, the T-dock and the jetty rock all fit that description.

Sebastian Inlet District reports place goliath grouper at the jetty tips mainly from May through August, the months when snook school there and water reaches the 80s.

The District publishes a weekly report and lists each one by week and year on its fishing report index. On July 1, 2025, the day the rebuilt north jetty reopened, the report said snook were non-existent because huge goliath groupers were harassing the schools and chasing them around; only two snook were hooked, and the groupers ate both of them and one redfish. Two weeks later, on July 14, 2025, plenty of snook were visible, but the goliaths were harassing and herding them like sheep on the farm.

Heat did not move them. The August 4, 2025 report recorded water at 87 degrees over four days and goliaths herding snook and reds all over the Sebastian Inlet, close enough to the north jetty to watch. On August 11, 2025, the District said the snook and redfish bite had slowed considerably, mostly because goliath groupers were harassing those fish all the time.

The 2026 season at Sebastian Inlet started earlier. On May 4, 2026, snook hooked at the tip on finger mullet were mostly too big to keep, and the goliaths kept eating them. The May 18, 2026 report, written with the water at 81 degrees, said the goliath groupers were on hand as always, eating quite a few hooked snook and reds at the tip over the rock pile.

A goliath grouper can be kept at Sebastian Inlet only by an angler holding an FWC goliath harvest permit and tag, during the March 1 to May 31 season, within a 24 to 36 inch slot.

The FWC goliath regulation page states that harvest is prohibited without a permit. Federal waters and the state waters of Martin County south through the Atlantic coast of the Keys stay closed, along with the St. Lucie River and Dry Tortugas National Park. State waters off Indian River and Brevard counties, which include Sebastian Inlet, are not on that closed list, so the inlet is open water for a permit holder.

The permit is scarce for Sebastian anglers. FWC's October 1, 2025 announcement for the 2026 season set a total recreational harvest of up to 200 goliath per year statewide, with no more than 50 from Everglades National Park, and awarded permits by random-draw lottery. Each permit allows one fish per person per open season, taken on hook and line only, and the harvester must submit a fin clip for genetic analysis. FWC lists the application window as Oct. 1 to 15 each year, with a $10 application fee and a permit cost of $150 for Florida residents or $500 for non-residents.

The slot keeps the large fish seen at the Sebastian jetties off limits. FWC says goliaths first mature at 5 or 6 years of age, about 36 inches, and the 2025 announcement says adult goliath grouper will continue to be prohibited from harvest statewide. FWC also states the limited harvest is not intended to address fishing depredation concerns, the losses of hooked snook that fill the District's summer reports.

A goliath hooked from the Sebastian Inlet jetties without a permit must be released immediately, alive and unharmed, and a large one must stay in the water.

FWC's rule page says the skeleton of a large goliath cannot support its weight out of the water, so the fish may suffer fatal injuries if lifted onto a vessel or a deck. That matters at Sebastian Inlet State Park, where Florida State Parks notes both jetties are ADA accessible and stand well above the water. Permit holders who keep a fish must fish natural bait on non-offset, non-stainless steel circle hooks, carry a dehooking device for any goliath they release, fix the tag to the lower jawbone, and report the harvest within 24 hours.

The park adds its own limits. Florida State Parks states that spearfishing is prohibited at Sebastian Inlet State Park, so hook and line is the only way a goliath is taken there in any case. The June 29, 2026 District report reminded anglers fishing for sharks and goliaths from the jetty that leaving dead baits on the deck breaks park and FWC rules, and that all of it must go in a container, back in the water, or out of sight.

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Goliath grouper at Sebastian Inlet take hooked snook and reds because a struggling fish beside the jetty rock is the easy, slow prey their ambush feeding is built for.

FWC describes the goliath as an opportunistic predator that feeds mostly on slow-moving, bottom-associated species, with calico crabs making up most of its diet, and says it will occasionally take a fish struggling on a fishing line while not actively hunting fast fish such as snappers. The Sebastian Inlet District biology article reaches the same picture from the jetties: goliaths eat mostly crustaceans, like lobsters and crabs, plus fish that can be ambushed as they swim through the inlet.

The District's biologist source called the habit of stealing snook from anglers a mystery and suggested a food problem tied to lost seagrass in the Indian River Lagoon. The Part Two article, posted August 14, 2023, also notes District commissioners' work armoring the shoreline, which has created more habitat for fish. Goliaths were not always present in these numbers: FWC records that harvest was prohibited in 1990 after the species had been fished commercially and recreationally since at least the late 1800s, and the Sebastian reports of 2025 and 2026 show what three decades of protection look like at one Treasure Coast inlet.