Abstract
An applicability of steel making slag as material for construction of submerged sea reef was examined in the Seto Inland Sea. Coverage of macroalgae on the artificial sea reef was nearly 100% at 4 months after the construction, which was clearly higher than those of surrounding natural area (<10%). Observations at 11 months later the construction, both in quantity and species number of fish were significantly high at the experimental site compared to the surrounding area. Benthic animals were also rich in species number and quantity at the sea reef, in which some species can be appropriate as feed for fish. It was proven that the artificial sea reef made of steel making slag is promising equipment to provide habitat for fish not only hiding space but also feed for fish.
