Barge hazard
I believe the answer is:
shoal
(Other definitions for shoal that I've seen before include "shallow water" , "School of fish" , "A great number of fish swimming together" , "Swarm of fish" , "Lots of fish" .)
I believe the answer is:
shoal
(Other definitions for shoal that I've seen before include "shallow water" , "School of fish" , "A great number of fish swimming together" , "Swarm of fish" , "Lots of fish" .)