FISH NEST BLOCK FOR PROTECTING FRY

PROBLEM TO BE SOLVED: To provide a fish nest block for protecting fry, consisting of a box body arranged with a screen. SOLUTION: This fish nest block for protecting fry is constituted by a rectangular box body arranged in the deep water part formed at the bank protection side of a river, forming a lattice-shaped screen 8 at an interval capable of passing fry through at least at one part of the front part facing to the surface side of the river and each plural holes 6 for lighting and passing water at the upper and lower surfaces thereof and at the both sides thereof positioned at the upstream and down stream sides. The fish nest block is constituted by bristling many bars 13 at an interval capable of passing fry through at least in a space directly rear to the screen arranged part in the box body.