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Venice’s Resident Dolphin Spurs Call for Boat Speed Limits After New Study Flags High-Risk Hotspots

A peer-reviewed study calls for strict speed limits, clear distance rules and tougher enforcement to reduce boat-strike and harassment risks in the city’s busiest waterways.

Overview

  • Researchers tracked Mimmo, a lone bottlenose dolphin in the Venice lagoon, from June through December 2025 and published their findings in Frontiers in Ethology.
  • Mimmo appears well adapted to the lagoon, regularly feeding on mullet and displaying behavior typical for his species.
  • The study identifies human activity as the main threat, citing poorly controlled boats, excessive speeds and intrusive approaches that can injure or stress the animal.
  • Repeated visits to the heavily trafficked San Marco basin pose particular danger due to dense traffic, propellers and constant disturbance.
  • Acoustic attempts to drive the dolphin back to the open sea failed, and experts deem capture or relocation too risky, so they urge firm enforcement of speed, distance and no-feeding or touching rules.