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;
• a feeding unit;
• each said cultivation unit being formed by a housing provided with:
• at least one inlet at a first end thereof for supply of water and feed from the feeding unit;
• and
• an outlet at a second end thereof for discharge of water and excess feed;
• at least one of the at least two cultivation units comprising rows of trays arranged along a height direction of the housing, said trays being horizontally retrievable from the housing;
• each said row of trays comprises several trays arranged in series in a longitudinal direction of the cultivation unit;
• the housing enclosing, in said longitudinal direction, the series of trays arranged in a horizontal plane, with a spacing forming an inlet chamber and an outlet chamber at respective ends of the series of trays, with the inlet chamber being in fluid communication with the inlet and with the outlet chamber being in fluid communication with the outlet,
• wherein each of the trays include holes or recesses located at ends thereof with the holes or recesses being configured to allow water and feed to flow into and out of each of the trays.