March 3, 2026Open Access

Delousing performance of ballan wrasse ( Labrus bergylta ) and lumpfish ( Cyclopterus lumpus ): seasonal consistency and the challenge of cryptic lice for lumpfish

Key Points

Effective delousing with cleaner fish occurs year-round, dependent on their health.
Results indicate cryptic lice must be included in sea lice management strategies.
Assessment using experimental conditions confirmed the ability of lumpfish to manage lice.
Highlights the importance of maintaining cleaner fish welfare for optimal efficacy.

Abstract

This study demonstrates the potential for year-round efficacy of cleaner fish in salmon aquaculture, although it is highly dependent on the health and welfare of cleaner fish in commercial conditions. It also tested for the first time delousing of cryptic lice under experimental conditions, and results indicate that they should be considered in sea lice management strategies involving lumpfish. © 2026 The Author(s). Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

Delousing performance of ballan wrasse ( Labrus bergylta ) and lumpfish ( Cyclopterus lumpus ): seasonal consistency and the challenge of cryptic lice for lumpfish

Key Points

Abstract

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