System for Polychaete Production Comprising a Retrievable Tray, and Method for Polychaete Production

A system for high-intensity polychaete production, comprising:

• at least two cultivation units (100), each cultivation unit (100) being formed by a housing (110) provided with at least one inlet (120) at a first end thereof for supply of water and feed from a feeding unit (400) and an outlet (130) at a second end thereof for discharge of water and excess feed, at least one of the at least two cultivation units (100) comprising several trays (300) arranged in rows along a height direction of the housing (110), the trays (300) being retrievable from the housing (110), wherein
• each row of trays (300) comprises several trays (300) arranged in series in a longitudinal direction of the cultivation unit (100),
• the housing (110) encloses the series of trays (300) in longitudinal direction with a spacing forming an inlet chamber (121) and an outlet chamber (131) at respective ends of the series of trays (300), the inlet chamber (121) being in fluid communication with the inlet (120) and the outlet chamber (131) being in fluid communication with the outlet (130), and
• the trays (300) are provided with holes or recesses (330) at ends thereof configured to allow water and feed to flow into and out of the trays (300).