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No Coffins At Coffins Patch But It Has Great Florida Keys Snorkeling

When it comes to Florida Keys snorkeling and novice diving, Coffins Patch, a reef at Marathon, is an amazing Florida Keys dive site.

The overall area is composed of 6 different reefs, each sporting a predominantly different coral.

This feature alone makes an exploratory trip out to this Florida reefs dive site worthwhile.

The Florida marine life is also extensive and diverse. For anyone interested in underwater photography, this is Florida coral reef dive site worth visiting.

Out of all the coral reefs that make up this dive site, the "Stake" is the easiest to identify. Jutting out of it's oval shape is an iron pole, hence it's name.

The Stake is a great shallow Florida Keys snorkeling spot at about 10 - 15' depth. There are two exceptions to this shallow rule at this Florida reef system.

At the west end of the Stake the depth reaches about 25'. Plus at the Outer Edge reef it drops to a depth of about 40'. This makes the Outer Edge Reef the best of the 6 for anyone scuba diving Florida Keys at Coffins Patch.

At the west end of the Stake you'll also encounter some larger, towering pillar coral. Plus since the Stake is a designated SPA area, you'll find a vast selection of fish and other marine life, including a relatively large number of lobsters crawling about.

Scrawled Fileflish

Scrawled Filefish, Photo FKNMS

Some of the other reefs are the Elbow which is situated about 1 mile east of the buoys. This is another shallow area at a maximum of 15 feet.

Just a short distance away from the Elbow is the Sand Circle which again is shallow at 15 feet.

Another of the coral reefs is where the remnants of a mid-1800's ship is located. It's referred to as the Three Bag Reef wreck and this reef has a maximum depth of about 15'.

The Pillar reef and the Outer Edge reef on the ocean side, make up the last of the six.

Over and above the Florida marine life and some remnants from the Three Bag Reef Wreck, you can also look for silver and gold coins from one of the Spanish Treasure Fleet vessels. However anything you find must be left where it lies.

The remains of the 292 ton Ignacio Wreck aka Sumey de San Ignacio or San Ignacio sank here in the 1733 hurricane.

Coffins Patch Reef SPA Area Map

SPA Area Map for Coffins Patch
Courtesy of

At-A-Glance Reef Dive Description
and GPS Coordinates

Coffins Patch
3.5 miles east of Key Colony Beach
GPS Co-ordinates
Beacon Remains
24 41.574N 080 56.332W
24 41.540 080 56.846
Sand Circle
24 41.486N 080 56.581W
Three Bag Reef Wreck
24 41.255N 080 56.020
24 41.100 080 57.850
Pillar Coral
24 40.950N 080 58.319W
Outer Edge
24 40.500N 080 57.400W
SPA protected area so there are 4 yellow markers around the Stake area. There are also 8 mooring buoys around the area marked CP0 - CP7
7 - 40'
Reef Site Description
This Florida coral reef runs 1.5 miles northeast and southwest and is comprised of 6 different reef structures
Snorkel Site
Excellent snorkel spot as it's shallow and the current is not very strong

Marine Life
Nurse sharks, butterflyfish, green moray eel, barracuda, blue tangs, angelfish, grouper, lobsters, jacks, yellowtail, sponges, different types of coral including fairly tall pillar coral, star coral, very large brain coral, elkhorn coral, fire coral

Even though Coffins Patch has a lot to offer, it's not a heavily trafficked Florida Keys dive site. Perhaps that's because it's better suited to coral reef snorkeling and novice diving.

However it's only about a mile away from the Thunderbolt Wreck which is a great advanced Florida Keys dive site, and on high visibility days a good intermediate dive spot. This would make this Marathon diving site the perfect last stop for advanced divers looking to unwind.

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Local Weather Zip Codes

Key Largo - 33037
Marathon - 33050
Key West - 33040