Biomimetic tag attachment inspired by the seal louse

Area of Science:

• Marine biology
• Biomimetics
• Mechanical engineering

Background:

• Current marine mammal tagging methods, primarily using epoxy adhesives, raise animal welfare and environmental concerns.
• The need for non-invasive, reliable attachment systems for satellite telemetry in marine species is critical.

Purpose of the Study:

• To develop and evaluate a biomimetic, adhesive-free attachment system for marine mammal telemetry.
• To create a system inspired by the grip mechanisms of the seal louse, *Echinophthirius horridus*.

Main Methods:

• A biomimetic approach was used, analyzing the morphology of *E. horridus* for functional principles.
• A 3D-printed comb-clamp prototype (TACS) was designed based on seal fur structure.
• Mechanical testing (tensile tests) and a live trial on a harbour seal were conducted.

Main Results:

• The TACS prototype demonstrated strong retention forces (4.58 N dry, 2.42 N wet) on seal fur.
• Successful proof-of-concept attachment on a live harbour seal for 50 minutes without distress or fur damage.
• The system met criteria for rapid, reversible application, low weight (<20 g), and secure, adhesive-free retention.

Conclusions:

• The TACS system presents a viable, environmentally responsible alternative to traditional adhesive-based tagging methods.
• Biologically inspired design, using *E. horridus* as a model, offers innovative solutions for marine bio-gripping applications.