Smalltooth Sawfish in Charlotte Harbor — The Endangered Prehistoric-Looking Fish You Should Never Touch

It is late morning on a mangrove flat off Pine Island Sound, the tide is dropping, and the water is the colour of weak tea. A boat-length ahead, a long dark shadow moves under the surface — too long, too straight, too flat to be a snook or a redfish. Then the shape turns and you see it: a flat snout half the length of the animal, lined on both sides with what look like the teeth of a saw blade.

You are looking at a smalltooth sawfish. Pristis pectinata. The only federally Endangered elasmobranch in Florida, the first marine fish ever listed under the U.S. Endangered Species Act, and one of the rarest large fish in North American waters. There are maybe a few thousand reproductive adults left on the planet. Most of them live within seventy miles of where you are standing.

If you ever hook one, the federal law is one sentence: cut the line as close to the mouth as safely possible, do not lift the fish, do not bring it into the boat, do not pose for a photo. That is it.

What it is

The smalltooth sawfish is a ray, not a shark. It looks shark-like — long muscular body, dorsal fins, shark-style swim — but flip it over and the giveaway is right there: five pairs of gill slits on the underside, the diagnostic ray anatomy. The body is also flattened top to bottom rather than side to side, another ray trait. The “saw” projecting from its head is a rostrum — a cartilaginous extension lined with 20 to 32 pairs of tooth-like denticles. It is a hunting tool and a defensive weapon, and you do not want to be in front of it when it whips sideways.

Adult smalltooth sawfish run 10 to 16 feet long, with historical records up to 18 feet. The rostrum alone is 20 to 30 percent of body length — a six-foot saw on a sixteen-foot fish is not unusual. They eat small schooling fish (mullet, sardines, menhaden), shrimp, and crabs. The saw is used like a sword: a sawfish swims into a school of baitfish and whips its rostrum side to side, stunning and slicing prey, then circles back to eat what falls.

There are five species of sawfish globally. Florida historically had two — smalltooth and largetooth (Pristis pristis). The largetooth is now considered extinct from U.S. waters. Only smalltooth remain, and only barely.

What you do

You do almost nothing. That is the honest answer.

This is not a species you go looking for the way you look for manatees at Crystal River or roseate spoonbills at Ding Darling. The smalltooth sawfish is cryptic, rare, and federally protected. You will not find a charter operator who promises a sighting, and any captain who says they will “land one for a photo” is offering you a federal felony.

What you can do legally and ethically:

• Fish the Charlotte Harbor flats the way you would for snook, redfish, or tarpon. Hire a legitimate guide out of Boca Grande, Punta Gorda, or Pine Island. Sawfish are an occasional bycatch on the same gear. The good guides know the protocol cold; the great guides will be visibly excited if you encounter one and will brief you before you cast.
• Run a kayak through the Caloosahatchee or Peace River estuaries at dawn or dusk in spring and summer. Juvenile sawfish (24 to 60 inches) use these shallow brackish nurseries for the first several years of life. Passive observation from a quiet kayak is the lowest-impact way to see one in the wild.
• Take a boat tour out of Flamingo in Everglades National Park. Florida Bay and the Ten Thousand Islands are the other major sawfish stronghold. Naturalist-led tours occasionally encounter them in shallow water.
• See one in captivity at Mote Marine Laboratory in Sarasota or the Florida Aquarium in Tampa. Both house research animals and run education programs. This is the closest legal close-up you will ever get.

If you do see one in the wild — from a boat, a kayak, or a flats skiff — the rule is the same as for manatees or right whales. Hold position. Do not chase. Do not drive over. Do not get in the water with it. A sawfish in shallow water will often sit motionless for long stretches; pass it slowly and at distance, get your binoculars or your zoom lens, and move on.

Conditions, honestly

This is a critically endangered species that almost nobody encounters even once in a lifetime of fishing Florida waters. Most visitors to Charlotte Harbor will never see one. The flats guides who fish the harbor full time log maybe a handful of sightings per year. The population is somewhere in the low thousands of adults globally, with a juvenile population an order of magnitude larger but cryptic in mangrove nurseries.

The range collapse is the story. A century ago smalltooth sawfish ranged from North Carolina to Texas, with viable populations in every Gulf and South Atlantic state. Captain Mel Berman, who fished Tampa Bay in the 1950s, logged over a hundred sawfish encounters a year. By 1990 that number was under five. Industrial trawl bycatch, gillnet entanglement, and estuary degradation gutted the population in the 20th century.

Today roughly 95 percent of all U.S. sawfish sightings come from a handful of Florida estuaries — Charlotte Harbor, the Everglades and Florida Bay, the Ten Thousand Islands, and the lower Keys. The U.S. population is now the world’s stronghold, which tells you how grim things are globally.

The 2024-2025 mass mortality event made it worse. Starting in late 2023, sawfish and other fish in the Florida Keys began exhibiting bizarre spinning behaviour and dying in unusual numbers. NOAA and Florida Fish and Wildlife traced it to a benthic dinoflagellate bloom (Gambierdiscus and related genera) producing neurotoxins. Hundreds of sawfish were affected. An emergency response captured and treated some animals; many did not survive. An already-fragile population took a measurable hit.

Why Charlotte Harbor

The harbor is critical pupping and nursery habitat. Newborn sawfish arrive at 24 to 30 inches long — about the size of a small barracuda. They use mangrove-lined shallows and seagrass beds as nurseries for the first several years before moving offshore as sub-adults. Charlotte Harbor’s geometry is almost perfect for this: shallow, warm, mangrove-lined, with two major freshwater estuaries (the Caloosahatchee and the Peace River) feeding brackish nursery zones. NOAA designated parts of the harbor as Critical Habitat under the ESA in 2009, restricting development and dredging in the most important nursery areas.

The Peace River juvenile population in particular has been the subject of nearly two decades of mark-recapture research. Every juvenile caught and released by researchers gets a tag and a tissue sample. The genetic database now lets scientists track family structure, dispersal, and recruitment year over year. It is one of the most important long-term datasets for any endangered fish in the world.

The angler reality

If you fish Charlotte Harbor or the Peace River often enough, eventually a sawfish will eat your bait. They are mostly ambush feeders but they will take a live mullet, pinfish, or shrimp on a bottom rig. The hook will usually catch in the corner of the mouth, sometimes in the rostrum.

Federal law — the Endangered Species Act, Section 9 — is unambiguous:

• Cut the line as close to the mouth as you can safely reach. Bring the fish boat-side if necessary, but do not lift it out of the water, and do not pull it onto the deck.
• Do not attempt to remove the hook. A circle hook usually rusts out within weeks. Stainless steel hooks are the bigger problem and are one reason FWC recommends non-stainless circle hooks for all flats fishing.
• Do not pose for photos with the fish out of water. A photo from above, with the fish still in the water beside the boat, is allowed and is actually useful for researchers (the rostrum pattern is individually identifiable).
• Report the encounter to NOAA. The Sawfish Hotline is 941-255-7403. There is also a NOAA Sawfish Encounter Database where you can log details — date, location, length estimate, hook location, photos.

Violations of these rules are ESA Section 9 takes, prosecutable by NOAA Office of Law Enforcement. Civil penalties run up to $25,000 per violation, criminal penalties can be higher. People have been prosecuted. The captains who book Charlotte Harbor know this and the legitimate guides will end your day on the spot if you reach for a fish.

Reporting matters more than people realise. Because the population is so small and so cryptic, every encounter is research data. Mark-recapture studies depend on angler reports for the bulk of their sighting database. A photo of the rostrum, a length estimate, and a GPS coordinate can become a published data point in a population assessment three years later.

Anatomy and behaviour

Field marks, from a distance:

• Shark-like profile but flattened top to bottom, sitting low in the water column.
• Pronounced saw projecting forward, 20 to 30 percent of body length, lined with paired teeth.
• Two dorsal fins, no spines on either.
• Underside (if visible from above in shallow water) shows five pairs of gill slits — the ray giveaway.
• Greenish-grey or olive-brown on top, pale below. Often nearly motionless in shallow water; when moving, the side-to-side body undulation is distinctly ray-like, not shark-like.

Smalltooth sawfish are ovoviviparous — eggs hatch inside the female and pups are born live. A female delivers 7 to 14 pups every other year. Each pup is born with a soft sheath over the rostrum that prevents injury to the mother during birth; the sheath dissolves within hours, the teeth harden, and the pup is on its own.

They are slow to mature (around 7 to 10 years to reproductive age) and long-lived (potentially 30 years or more). The combination of late maturation, low fecundity, and slow growth is why recovery is glacial even with full federal protection. You cannot rebuild a sawfish population the way you can rebuild a fast-spawning baitfish.

What it’s not

It is not a shark. The gill slits on the underside settle that. Sharks have gill slits on the sides of the head; rays have them underneath. Sawfish are rays.

It is not an aggressive animal. There is no documented record of a sawfish pursuing a human in the water. The danger from the rostrum is accidental — a startled fish whipping its saw sideways, a snorkeler getting too close on the wrong side. Treat the saw the same way you would treat the antlers on a rutting elk: keep distance, do not surprise it, never get between the saw and its body.

It is not a sport fish. The species is fully federally protected, has been since 2003, and there is no legal targeted fishery. Anyone advertising sawfish charters is committing a crime.

It is not a sawshark. There is a separate family of small (under five feet) sharks called sawsharks, found in the Indo-Pacific and Atlantic deeper water, that have a saw-like rostrum with barbels halfway down it. Sawsharks have gill slits on the side, like other sharks. The Florida sawfish has none of that and dwarfs them in size.

What it IS

It is a living fossil. Sawfish lineages go back roughly 100 million years in the fossil record — they coexisted with the last non-avian dinosaurs. The body plan you are looking at when one slides under your kayak is essentially unchanged from animals that swam past mosasaurs in shallow Cretaceous seas. We almost wiped them out in seventy years of industrial fishing.

It is a sentinel species for Florida estuaries. The same conditions that support a healthy sawfish nursery — clean brackish water, intact mangrove fringes, low boat traffic, functional seagrass — support a healthy snook fishery, a healthy redfish fishery, a healthy tarpon migration, and a healthy juvenile shark population. When the sawfish recovers, the whole estuary is recovering. When the sawfish dies off, the estuary is in trouble. The 2024-2025 spinning event was a warning siren and it was heard.

It is also a reason to be modest about what we know. The Peace River juvenile dataset is one of the best long-term endangered-fish studies in the world, and even that dataset only catches a fraction of the population. The adult population is mostly invisible — they move between offshore deep water, intermediate flats, and the inshore pupping grounds, and tracking individual adults is still hard. Every angler report, every researcher tag, every kayak sighting fills in a tiny piece of the picture.

You probably will not see one. But if you do, you will be looking at the last best chance for a species that lived through six mass extinctions and almost did not survive the 20th century.

Practical card

• Where to look (passively): Charlotte Harbor flats, Peace River and Caloosahatchee River estuaries, Pine Island Sound, Florida Bay (Flamingo boat tours), Ten Thousand Islands NWR.
• Best season: Late spring and summer (April through September) — juvenile nursery activity peaks in warm shallow water.
• Best hour: Dawn and the first two hours after sunrise; late afternoon on a falling tide. Low boat traffic, good visibility.
• Optics: Polarised sunglasses are non-negotiable on the flats. 8×42 binoculars from a boat. A zoom lens (200mm+) for any documentation — you should never be close enough to need a wider lens.
• If you hook one: Cut the line as close to the mouth as safely possible. Do not lift, do not pose, do not de-hook. Stay calm, keep the fish in the water boat-side, free it cleanly.
• Report: NOAA Sawfish Hotline 941-255-7403. Or via the NOAA Sawfish Encounter Database online.
• Captive viewing (legal close-up): Mote Marine Laboratory (Sarasota), Florida Aquarium (Tampa).
• Federal status: ESA Endangered (2003). IUCN Critically Endangered. State of Florida protected.
• Coordinates: Charlotte Harbor approximate centre — 26.7700, -82.1100.
• Reading: NOAA Smalltooth Sawfish Recovery Plan (2009). Florida Museum of Natural History sawfish page. The Devil’s Cormorant — broader on apex estuarine species but covers the sawfish question well.

If you fish the harbor, fish it well. If you cross paths with a sawfish, cut the line and call NOAA. That is the most useful thing you can do for the species today.