Delaware Sinks Retired Vessel to Form Artificial Reef

A 180-foot fishing boat was sunk at Delaware Reef Site 13 to expand habitats for local marine life.

Updated on Oct. 27, 2026 in Aquariums

Bold vector editorial illustration of a submerged steel lattice reef structure on the ocean floor, surrounded by silhouettes of small fish. — Delaware state officials sank the F/V Calcasieu Pass at Reef Site 13 in August, creating an artificial habitat for local marine life. AI Illustration. Upload story photo >

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Do you believe state-sponsored artificial reef projects are an effective way to improve local marine ecosystems?

State officials sank the 180-foot F/V Calcasieu Pass on August 12, 2026, at Delaware Reef Site 13. The project aims to provide new breeding, feeding, and hiding locations for fish along with opportunities for recreational diving.

Why it matters

Artificial reefs are established to support marine biodiversity by creating necessary structures in open water. While the site is now in place, scientists continue to monitor the area to track the long-term impact on local fish populations.

The F/V Calcasieu Pass was acquired for $1 and sunk 26 miles offshore from the Indian River Inlet. Crews removed all hazardous materials, oils, and loose debris from the 180-foot structure prior to the sinking.

The players

Coleen Marine

This maritime company is responsible for the preparation, towing, and sinking of vessels used in Delaware reef projects.

Ocean Harvesters

This organization managed the transfer of the F/V Calcasieu Pass to support the artificial reef program.

The details

Coleen Marine handled the preparation, towing, and final placement of the vessel. State environmental agencies are now conducting long-term monitoring to evaluate structural stability and the attraction of marine life to the reef.

2020: Coleen Marine sank the vessel the Reedville.
2024: Ocean Harvesters transferred the vessel for $1.
August 12, 2026: The F/V Calcasieu Pass was sunk.

Culture Shift

The project follows the pattern set by the 2020 sinking of the Reedville as part of the state's broader effort to expand marine habitats. These artificial reefs reflect a growing trend of repurposing retired maritime infrastructure to bolster ecosystem health.

Recreational divers and local anglers can utilize the new reef site for diving and fishing activities. Residents should monitor future state updates regarding marine life migration patterns to these new habitats.

The takeaway

Artificial reefs serve as essential habitats that support the growth and health of local marine populations. These underwater structures often evolve into complex ecosystems that provide long-term benefits to coastal biodiversity.