AI Generated illustration created using ChatGPT. (Because I never saw the Ghost)

My First Ocean Scuba Dive - Spanish Rocks Reef

Descending into the Murk

At around 15 to 20 feet deep, I followed my dive guide along the limestone ledges of Spanish Rocks Reef. The wave-driven surge pushed and pulled me sideways as I drifted along the shallow Gulf bottom, the constant motion keeping sand suspended in the water. Sea grass and scattered limestone formations appeared and disappeared in the haze.

Visibility remained limited to roughly four feet. Everything beyond that distance simply faded into green-gray murk.

The only sound I hear is the crackling, cricket-like noise of snapping shrimp. 

Then suddenly — something slammed into my right shoulder.

It wasn’t a brush or a bump from the surge. It was solid. Heavy. Deliberate through my thin polyester layer as seen in the photo above.

It felt exactly like the edge of a 1 to 1.5-inch-thick wooden board striking my shoulder. It was not soft and squishy as I would imagine a fish would feel like. 

Too afraid to look back, I immediately did a 360 roll, while swimming forward. But I didn't see anything.

Only suspended sand.

Only murk.

I continued the dive.

The murky water

The Ghost Returns

And what seemed about fifteen to thirty seconds later, it happened again.

Another solid impact — this time into my right rib cage.

The same rigid, deliberate force.

Whatever it was had circled back.

In that low-visibility water, the encounter felt calculated, precise, and investigative. A curious presence moving through the haze, unseen but unmistakably powerful.

I did not panic, I just kept swimming again too afraid to look back. I just had a heightened awareness and controlled movement.

Then it was gone.

No fin.

A couple minutes or so later a shadow moved overhead which I thought was a boat but I didn't hear the sound of a propeller. Was this silent shadow the Ghost letting me know of their presence?

What Was It?

This dive took place in June 2022, but the question of what I encountered that day has stayed with me ever since.

Over the years, I’ve asked scuba divers familiar with Florida Gulf conditions what they think it might have been. Nearly all of them came to the same conclusion: a shark.

But not everyone agreed.

A family member of mine, a former marine biologist, offered a different perspective — suggesting it may have been a manatee. And for a long time, I wrestled with that possibility. Had I been bumped by a clumsy, gentle giant? Or something more deliberate?

For years, I debated whether I had been visited by a curious shark or an awkward manatee.

But the memory of that impact wouldn’t fade.

That sharp, rigid strike — like a finished wooden board — didn’t match the idea of something soft or accidental. It felt intentional. Structured. Directed.

Biological experts may offer one explanation.

But the physics of the impact tell another story. So I asked two different AI models what it was. I entered, time of day, date, location, temperature, depth and asked for statistical probability analysis. (See results at the very bottom)

And so based on the location, depth, and behavior, the most likely explanation was a juvenile shark — possibly a young bull shark — investigating an unfamiliar object in low-visibility water.

Sharks are known to use “bumping” behavior as a form of investigation, particularly in murky water where visibility is limited. Rather than immediately biting, they sometimes make contact to assess what they are encountering.

The shallow Gulf waters off Bradenton Beach are known nursery areas for several shark species, including juvenile bull sharks, blacktip sharks, and other coastal species.

In murky water, curiosity becomes tactile.

And that day, I was the object of that curiosity. (References at the bottom of this post)

A First Dive to Remember

Despite the adrenaline, I continued the dive and finished without further incident. What began as a moment of uncertainty transformed into something unforgettable — a reminder that the ocean is not always about what you see, but sometimes about what you don’t.

My first ocean scuba dive became something more than just a dive. It became an encounter with the unseen — a brief moment sharing space with one of the Gulf’s silent residents.

Dive Details

Location: Spanish Rocks Reef, Bradenton Beach, Florida
Type of Dive: Shore Dive
Depth: 15–20 feet
Visibility: 3–4 feet
Conditions: Warm Gulf water, mild surge
Notable Encounter: Likely juvenile shark investigative bump

Looking back at photos from June 2022, the water appears peaceful and inviting. Calm on the surface, warm, and deceptively welcoming. But my shoulder remembers a different story — the day one of the Gulf’s most efficient “Roman gladiators” came out of the fog to test my resolve.

Final Thoughts

This remains my first — and only — ocean scuba dive. And while I didn’t see what struck me that day, the experience left a lasting impression.

Sometimes the most memorable moments underwater aren’t about clear water and colorful reefs.

Sometimes they happen in the murk.

Where something unseen brushes past…

…and reminds you that you’re not alone beneath the surface.

Author Bio:

Gordon is an award-winning filmmaker and PADI-certified diver with a specialization in Shark Conservation

The Case for the Bull Shark: Supporting References - From Google Gemini Research. 

1. Anatomical Density: The "Finished Board" Effect

Unlike mammals with blubber and flexible skin, the Bull shark (Carcharhinus leucas) possesses a rostrum (snout) made of highly calcified, dense cartilage.

• The Reference: The Florida Museum of Natural History notes that Bull sharks have a "short, blunt, and rounded snout" specifically adapted for high-impact hunting.
• The "Board" Feel: This reinforced cartilage, covered in tightly stretched dermal denticles, creates a rigid, non-compressible surface that divers often describe as feeling like solid wood or industrial plastic upon impact.

2. The 1.5-Inch "Profile" (Juvenile Identification)

A juvenile Bull shark in the 4-to-5-foot range has a snout height and leading fin edge that perfectly matches your 1.5-inch observation.

• The Reference: According to National Geographic, Bull sharks are "thick and stout-bodied."
• Biological Math: At birth, Bull sharks are roughly 2.4 feet long. By the time they reach 4–5 feet, the leading edge of their dorsal fin and the "rim" of their blunt snout have thickened to approximately 1 to 1.5 inches, creating a narrow, consistent "strike zone" during a bump.

3. Behavioral Forensics: The "Bump-and-Circle"

Sharks in turbid water use "tactile investigation" to identify objects that their limited vision cannot resolve.

• The Reference: The Florida Fish and Wildlife Conservation Commission (FWC) highlights that Bull sharks often frequent "turbid, nearshore waters" where they rely on their lateral line and physical contact to "braille" their environment.
• The Sequence: A Manatee is a "passive grazer" that typically bumps and moves away clumsily. A Bull shark's double-hit (shoulder, then ribs 30 seconds later) is a documented predatory "test" used to gauge the size and reaction of potential competition or prey.

4. Texture: Shark vs. Manatee

• Manatee: Wikipedia and biological records describe Manatee skin as "thick, wrinkled, and leathery" with a soft underlayer of fat. An impact feels "cushioned."
• Shark: Research from Florida Atlantic University on shark skin mechanics shows that it functions as an "exotendon"—it is under high tension and becomes incredibly stiff during movement, explaining your "finished board" sensation.

Shark Encounter Analysis

ChatGPT Result:

Final Probability (Based on All Your Details)

**Most Likely:**

🦈 **Bull shark — 75%**

**Possible:**

🦈 **Other coastal shark (blacktip, sandbar, spinner)** — 15%

**Less Likely:**

* 🐋 **West Indian manatee — 8%**

**Very Unlikely:**

* Other (ray, large fish, surge, etc.) — 2%

Why Bull Shark Is Most Likely

Key clues:

* Spanish Rocks Reef (Anna Maria Island)

* June 13 (summer peak)

* 9:40–10:00 AM

* 3–4 ft murky visibility

* Quick, firm bump

* Felt like flat stiff board

* Second bump

* Shadow overhead

* No wetsuit (accurate feel)

* You stayed calm and kept swimming

That combination **fits bull shark investigative behavior very well**.