A cage net (3) includes a plurality of screen sheets (31) each having an upper section (311) and a tapered lower section (312). The upper sections (311) are interconnected side by side to form a surrounding wall (300), and the lower sections (312) are interconnected side by side to form a bottom wall (301). The lower sections (312) are folded inwardly from the respective upper sections (311) and have tapered ends extending to a substantially central part of the bottom wall (301). The case net (3) can be fabricated conveniently at low cost.
