Those strange new shapes sitting offshore from North Beach are not art installations. Miami Beach has quietly dropped three 3D-printed "insta-reef" modules into the water off 81st Street as part of a University of Miami experiment that aims to both jump-start coral growth and sap storm waves before they slam into the sand. Clustered SEAHIVE structures were placed roughly 750 feet offshore and will be tracked for coral survival, fish recruitment, and how much wave energy they actually strip out. The test builds on a 2023 pilot and is designed to see whether engineered reefs plus living corals can become a practical extra layer of shoreline defense for this vulnerable stretch of coast.
What Went in the Water
According to the University of Miami, the second phase of the ECoREEF project installed three 3D-printed SEAHIVE clustered structures manufactured by 1Print about 750 feet off 81st Street in Miami Beach. Scientists attached 205 adult coral colonies representing seven native species, then used enclosures to settle thousands of coral larvae on the modules to push rapid growth. The setup is being run as an offshore living laboratory in partnership with SECORE International and city officials so researchers can monitor how the community develops and how the structures perform for coastal protection.
How the Lab Results Translate
Physical testing in the university's SUSTAIN wave tank found that hybrid reef models, SEAHIVE structures combined with staghorn corals, could in the shallowest conditions tested dissipate up to 98% of incoming wave energy, with the corals themselves providing as much as 56% of that reduction. That finding was published in the Coastal Engineering Journal. Landolf Rhode-Barbarigos said in a statement to the University of Miami, "Every aspect of the structure’s physics was informed by engineering analysis and physical testing."
Who Printed Them and Who Is Backing the Work
The concrete modules were produced by 1Print, a University of Miami licensee that is commercializing SEAHIVE® 3DCP. Leaders at 1Print and university partners say the project builds on Department of Defense research, including DARPA and U.S. Army SBIR support, that helped accelerate research, development, and fabrication. Company officials say they are already in talks with municipalities and defense partners about scaling the technology for a range of coastal uses.
Early Life on the New Reef
To give the experiment a head start, researchers attached hundreds of adult corals and introduced thousands of larvae onto the structures to jump-start reef communities. Early monitoring will track survival, growth, and fish recruitment as the modules age. The effort expands an initial 2023 pilot and lets scientists compare colonization on engineered substrates with nearby natural reef patches. Those deployment details and coral counts were described in a university release summarized by Newswise.
Local Buy-In and Sensor Plans
City officials are backing the experiment, and state and federal agencies have taken notice. The SEAHIVE work has drawn interest from the Florida Department of Transportation as well as defense and climate-tech funders. Earlier phases of SEAHIVE development received support from federal and state research programs that helped push prototypes from the lab into open water. As reported by the Miami Herald, 1Print is now pursuing grant funding to outfit the arrays with in-situ wave sensors and other monitoring gear so wave attenuation can be quantified in real time.
What Is Next
Andrew Baker told the Miami Herald that "the next phase is being permitted and planned," and the team hopes a future 100-meter deployment about 200 meters from shore, inside the swim zone, will test how a longer, continuous hybrid reef performs. Permitting, community outreach, and longer-term monitoring will shape whether the approach can be scaled up or used as a complement to seawalls and other defenses. For now, lab proof and early colonization results are promising, but real storm testing remains the ultimate benchmark.
Why This Matters for Miami Beach
If the lab numbers hold in the ocean, hybrid SEAHIVE reefs could become a low-profile first line of defense that builds habitat while reducing wave energy that reaches the shore. Experts caution that porosity, placement, coral cover, and maintenance all affect how well any reef breakwater can perform, and the team will need multi-year monitoring and storm-scale data before officials can lean on these systems for planning. Other 3D-printed reef pilots, including Gulf deployments highlighted by 1Print, suggest that rapid marine colonization is possible, but regulators and residents are likely to want rigorous, peer-reviewed results before anyone starts rewriting shoreline policy.
