Universal Multi-Species Shellfish Gauge – 8-In-1 Fishing & Diving Tool

Comprehensive Legal Minimum Size Checks for Crabs, Lobsters, Scallops, Mussels & Cockles

Navigating regional fishery bylaws without carrying an entire pocketful of measuring devices is a constant challenge for coastal anglers, freedivers, and commercial shellfish harvesters. Mismatched or missing gauges risk accidental retention of undersized catch and severe regulatory fines.

Designed and manufactured in the UK by the original CAD designer, this all-in-one multi-species shellfish gauge integrates eight distinct, precision-molded measuring slots and apertures into a single, compact body. Engineered for maximum versatility across UK coastal waters, it allows for instant compliance checks on everything from lobsters and crabs to scallops, mussels, and cockles.

Key Marine Engineering Features & Field Benefits

• 8-In-1 Multi-Species Measurement Suite:

  • M (Male Edible/Brown Crab): 160mm Width Slot

  • F (Female Edible/Brown Crab): 150mm Width Slot

  • SP (Spider Crab): 130mm Carapace Slot

  • Crawfish / Spiny Lobster: 110mm Carapace Slot

  • Scallop: 100mm Shell Diameter Slot

  • European / Common Lobster: 90mm Carapace Slot

  • Mussels: 50mm Length Slot

  • Cockles: 20mm Internal Measuring Hole

• Direct CAD Designer Support: As the original engineer behind this design, custom modifications, tailored millimeter sizes, or regional-specific layout changes can be made swiftly to suit your exact local bylaws.

• 100% Saltwater & Weatherproof PETG: Precision 3D-printed using heavy-duty, marine-grade PETG polymer that will not absorb water, degrade under UV rays, or fracture when dropped on wet rocks or boat decks.

• High-Contrast Molded Markings: Species identifiers and millimeter dimensions are molded directly into the gauge body in high-visibility colors, ensuring numbers won't fade or wear off over time.

• Integrated Rigging / Lanyard Point: Built-in mounting hole lets you secure the tool to a dive belt, wrist lanyard, or catch bag to prevent accidental loss in sea currents.

Technical Specifications & Marine Fitment

• Measuring Limits Covered: 160mm (M Crab), 150mm (F Crab), 130mm (Spider Crab), 110mm (Crawfish), 100mm (Scallop), 90mm (Lobster), 50mm (Mussel), 20mm Hole (Cockle)

• Material: Outdoor Marine-Grade PETG Polymer

• Standard Supply Color: High-Vis Yellow Body with Contrast Markings (Custom colors available upon request)

• Manufacturing Origin: Designed & Made in the UK

Package Contents

• 1x Universal 8-In-1 Multi-Species Shellfish Measuring Gauge

Regional Compliance & Custom Sizing Requests

• Local Bylaw Responsibility: Minimum landing sizes vary across specific Inshore Fisheries and Conservation Authorities (IFCAs) and regional coastal districts. Always verify your local regulation limits before harvesting.

• Custom Modifications: Need specific dimensions adjusted to match your local district (e.g., 87mm lobster or 140mm crab)? Contact us prior to checkout and we can modify the master CAD model for your custom print.