Crowding device for fish farms

The horizontally movable perforated crowding grid with suction arrangement addresses stress and mortality issues in fish crowding by allowing fish to swim through when lowered and being gently guided upwards, ensuring minimal disruption and efficient transfer.

AU2025209202A1Pending Publication Date: 2026-07-09SEARAS AS
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Patent Information

Authority / Receiving Office
AU · AU
Patent Type
Applications
Current Assignee / Owner
SEARAS AS
Filing Date
2025-01-16
Publication Date
2026-07-09

AI Technical Summary

Technical Problem

Existing fish crowding methods in aquaculture tanks cause stress and mortality due to disruptive flow patterns, sedimentation, and difficult cleaning, especially in large tanks with prolonged fish residence, and existing solutions are not gentle or practical for frequent operations.

Method used

A horizontally arranged perforated crowding grid that moves up and down around a central column, allowing fish to swim through when lowered and being gently crowded upwards when raised, with a suction arrangement to transfer them out, using flexible elements to seal the grid to the tank walls and maintaining smooth water flow.

Benefits of technology

The solution minimizes stress and mortality by gently guiding fish out of the tank, preventing sedimentation, and ensuring easy cleaning, suitable for frequent operations and tanks with short or long fish residence periods.

✦ Generated by Eureka AI based on patent content.

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Abstract

A device and method are described for crowding and discharging live marine organisms from a tank, comprising a horizontally arranged perforated crowding grid, where the crowding grid is designed to be lifted from an inactive position at the bottom of the tank and vertically upward to crowd the liquid and marine organisms out of the tank.
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