3D-Printed Harness Aids Injured Sea Turtle Rescue
A 3D-Printed Harness for Charlotte: Advancing Sea Turtle Rehabilitation
Imagine swimming through the ocean, but your body constantly pulls your rear upwards, making normal movement nearly impossible. This is the daily reality for Charlotte, a male green sea turtle residing at the Mystic Aquarium in Connecticut. He suffers from "Bubble Butt Syndrome," a debilitating condition that typically arises from boat collisions and impacts a sea turtle's ability to swim and forage, as detailed in the Mystic Aquarium blog and an article by WBUR Here & Now.
Source: Charlotte the sea turtle swims with his custom 3D-printed harness, designed to help him overcome "Bubble Butt Syndrome." This innovative solution allows him to navigate more naturally.
In 2008, Charlotte, then a juvenile, was discovered on Jekyll Island, Georgia, unable to swim or feed adequately to survive, a story shared on the Formlabs blog. The Georgia Sea Turtle Center initially cared for him before his relocation to Mystic Aquarium, as noted on the Jekyll Island website. Now, after years of unsuccessful traditional treatments, a groundbreaking 3D-printed harness offers Charlotte a new lease on life, allowing him to swim more naturally and exercise his atrophied hind flippers, also highlighted by Formlabs.
Quick Summary
- The Problem: Charlotte, a green sea turtle, suffers from "Bubble Butt Syndrome" (positive buoyancy syndrome), caused by a boat collision. This condition traps air under his shell, forcing his rear upwards, hindering swimming, feeding, and causing hind flipper atrophy.
- Past Failures: Traditional methods like attaching weights directly to his shell or using weighted fabric belts were ineffective due to irritation or Charlotte’s ability to remove them.
- The Inspiration: A student’s 3D-printed weighted belt design for turtles inspired Mystic Aquarium’s lead veterinarian to seek a 3D printing solution.
- The Collaboration: Adia (3D printing solutions), Functional 3D Team (3D scanning), and New Balance Athletics (CAD design) partnered to create a custom harness.
- The Technology: Selective Laser Sintering (SLS) 3D printing with Formlabs’ Fuse Series Ecosystem and Nylon 11 CF Powder was chosen for its strength, flexibility, and accessibility.
- The Outcome: Charlotte received his new harness in December 2024. Early results show increased hind flipper movement, a straightening tail, and more neutral buoyancy, indicating significant improvement.
- Future Impact: This project aims to create a scalable 3D printing workflow for other aquariums and rehabilitation centers to help more turtles with similar conditions.
The Challenge of "Bubble Butt Syndrome"
"Bubble Butt Syndrome," also known as positive buoyancy syndrome, is a severe injury threatening countless sea turtles, often stemming from vessel strikes. The National Oceanic and Atmospheric Administration (NOAA) estimates that hundreds of sea turtles are impacted by vessel strikes annually in the United States. This syndrome leaves a turtle’s carapace deformed, trapping air and impacting internal organs, according to the Formlabs blog. Sea turtles have spines that run directly beneath their shells, making them highly susceptible to spinal and gastrointestinal nerve damage from boat impacts, as reported by PopSci. This damage can lead to partial paralysis of the hind flippers and the accumulation of gas in the gastrointestinal system, forcing the turtle to swim vertically rather than horizontally, as explained by WBUR Here & Now. For Charlotte, this meant his rear remained perpetually at the surface of the water, hindering his movement, making feeding difficult, and compressing his upper organs, as detailed on the Formlabs blog.
Early attempts to help Charlotte involved attaching weights directly to his shell or using weighted fabric belts, outlined on the Formlabs blog. These methods proved ineffective; adhesives caused irritation, and Charlotte, affectionately dubbed "Charlotte Houdini" by Nick Gondek of Adia, was adept at removing the devices, also mentioned by Formlabs.
❝ Charlotte Houdini ❞
Adia
This constant buoyancy forced Charlotte to swim at an awkward angle for years, contributing to the atrophy of his hind flippers, as reported by WBUR Here & Now.
Understanding Bubble Butt Syndrome
This condition, often a consequence of boat collisions, presents significant challenges for affected sea turtles. Here’s a closer look:
| Aspect | Description |
|---|---|
| Primary Cause | Typically boat collisions, which can damage the turtle's carapace and spine. Plastic ingestion can also cause gas buildup. |
| Physical Impact | Deformed shell traps air, causing positive buoyancy. Spinal and nerve damage can affect gastrointestinal function and lead to hind flipper paralysis. |
| Swimming Behavior | Turtles swim vertically instead of horizontally, with their rear end floating upwards. This disrupts natural movement. |
| Feeding Challenges | Inability to dive properly makes it difficult to reach food sources on the seabed. |
| Organ Compression | Constant upward pressure can compress internal organs, potentially leading to further health issues. |
| Vulnerability | Increased risk of further boat collisions and predation due to being stuck at the surface. |
| Rehabilitation | Often requires long-term care; many affected turtles cannot be released back into the wild. |
The Genesis of a 3D-Printed Solution
The breakthrough came from an unexpected source: Gabriela Queiroz Miranda, a Minnesota student who had developed a weighted belt for turtles with "Bubble Butt Syndrome," featured in Science News Explores. Her project inspired Dr. Jenn Flower, then lead clinical veterinarian at Mystic Aquarium, to seek an innovative solution, as explained on the Formlabs blog. Dr. Flower contacted Adia, a 3D printing solutions provider in Connecticut. Adia's Director of Additive Manufacturing, Nick Gondek, recognized the immense potential of 3D printing for such a customized challenge, also noted by Formlabs. 3D printing workflows excel in applications requiring high customization, complex geometries, and low production volumes, according to Formlabs.
The primary hurdle remained: how to attach weights to Charlotte’s uneven carapace securely and comfortably. This demanded a highly tailored device. Chris Wilczewski and the Functional 3D Team, specialists in 3D scanning, were brought in to create high-resolution 3D images of Charlotte's shell, forming the foundation for the harness design, as described on the Formlabs blog. Balancing precision with veterinary precautions for Charlotte’s safety was paramount, also emphasized by Formlabs.
Designing the Custom Harness with 3D Printing
New Balance Athletics, a leading sports equipment manufacturer, joined the collaborative effort. Chris Wawrousek, Senior Creative Lead at New Balance, an expert in computer-aided design (CAD), was instrumental, as reported on the Formlabs blog. CAD, which uses algorithms to generate and refine designs, proved highly efficient for creating a custom-fitted harness. Over several months, the team developed multiple iterations, including broad, belt-like apparatuses, small clips, and thick straps with snap closures, according to the Formlabs blog. The focus remained on Charlotte's comfort, secure attachment mechanisms, and the ability to adjust weights, also stated by Formlabs.
Eventually, a lightweight, adjustable harness designed to fit precisely around the edge of Charlotte's shell emerged, as detailed by PopSci. The design allowed for easy removal and adjustment as needed. The material choice was critical, requiring maximum strength, accuracy, and repeatability. Oxford Performance Materials (OPM), a 3D printing material manufacturer, developed a specialized material for an SLS 3D printer, as documented on the Formlabs blog. OPM's SLS parts delivered exceptional quality, strength, lightness, and slight flexibility vital for swimming, also highlighted by Formlabs. While OPM's workflow allowed Charlotte to swim normally and train his hind flippers, Adia sought a more scalable and accessible solution, according to Formlabs.
The selection of Selective Laser Sintering (SLS) technology was pivotal due to its build volume, its ability to print parts without support structures, and the availability of suitable materials, as discussed on the Formlabs blog. Adia's partnership with Formlabs and their Fuse Series Ecosystem provided the ideal combination of industrial-grade strength, user-friendly workflow, and diverse material options. Formlabs' Nylon 11 CF Powder offered the necessary stiffness without the complexity often found in other SLS systems, also mentioned by Formlabs. The harness was designed to fit within the build volume of a Fuse printer, ensuring its accessibility for other aquariums facing similar challenges, according to Formlabs.
Source: formlabs.com
The Formlabs Fuse Ecosystem, including the Fuse 1+ 3D printer, provides an accessible and robust solution for creating durable, customized parts like Charlotte’s harness.
Impact and Future Implications
In December 2024, Charlotte received his new harness, printed on the Formlabs Fuse Series Ecosystem with Nylon 11 CF Powder, as reported by WBUR Here & Now. The collaborative effort of New Balance, Adia, and Mystic Aquarium allowed for its assembly. Claire Bolster, Charlotte’s caregiver and aquarist at Mystic Aquarium, reported positive observations; Charlotte swims contentedly and appears comfortable, as stated on the Formlabs blog. The team plans to gradually add weights as Charlotte adapts, further counteracting his positive buoyancy, also mentioned by Formlabs. Charlotte, who weighs 138 pounds and will continue to grow, will wear the harness for several hours daily as part of his physical therapy, according to WBUR Here & Now.
Early results are promising: Charlotte’s hind flippers show increased movement, and his tail, previously curved due to his injury, has started to straighten, as reported by WBUR Here & Now. In male green sea turtles, the tail typically lies flat, a fact shared by the Olive Ridley Project. Historically, Charlotte would sleep with his posterior elevated, but now he exhibits a more neutral buoyancy, a positive indicator of returning to typical sea turtle behavior, as noted by WBUR Here & Now.
Source: iflscience.com
Charlotte swims with his new harness, showing increased movement in his hind flippers and a noticeable straightening of his tail, indicating successful rehabilitation.
Conclusion
The success of Charlotte's 3D-printed harness represents a significant advancement in animal rehabilitation, as cited on the Formlabs blog. This project highlights the crucial intersection of veterinary science, engineering, and innovative manufacturing. Adia, New Balance, and Formlabs aim to scale this approach, developing a streamlined workflow that can transform shell scan data directly into harness designs for SLS systems. This will provide a readily available solution for other aquariums and rehabilitation centers, also mentioned by Formlabs. 3D printing offers a relatively cost-effective method for highly customizable, low-volume production, making it an invaluable tool for helping animals with unique medical needs, according to Formlabs. As more aquariums contact Adia for assistance with similar cases, the future looks brighter for sea turtles afflicted with "Bubble Butt Syndrome," as conveyed on the Formlabs blog.
Frequently Asked Questions
What is "Bubble Butt Syndrome?"
"Bubble Butt Syndrome," also known as positive buoyancy syndrome, is a condition in sea turtles where trapped air or gas causes their rear end to float upwards. It is often caused by boat collisions that damage the shell and spine, or by plastic ingestion leading to gas buildup in the digestive system. This prevents them from swimming and diving normally.
Why couldn’t traditional methods help Charlotte?
Previous attempts involved attaching weights directly to Charlotte’s shell or using weighted fabric belts. These methods failed because adhesives caused skin irritation, or Charlotte, known for his cleverness, would simply remove the devices. The constant need for adjustment as he grew and shed scutes also made traditional methods impractical.
How did 3D printing make a difference?
3D printing allowed for the creation of a custom-fitted harness that precisely matches Charlotte’s unique shell geometry. This highly personalized approach ensured comfort, secure attachment of weights, and adjustability, overcoming the limitations of off-the-shelf solutions. The chosen material, carbon fiber-reinforced nylon, provided the necessary strength, flexibility, and durability.
What are the long-term goals of this project?
Beyond helping Charlotte, the project aims to develop a scalable and accessible workflow for other aquariums and rehabilitation centers. By streamlining the process from 3D scanning a turtle’s shell to 3D printing a custom harness, the collaborators hope to provide a cost-effective and efficient solution for many more sea turtles suffering from "Bubble Butt Syndrome" globally.
Source: YouTube
Source: YouTube