<；P>；PROBLEM TO BE SOLVED: To provide an algal reef unit, having nutrient-feeding functions and functions for promoting adhesion of algae, in combination and further being capable of controlling nutrient supply. <；P>；SOLUTION: The algal reef unit 31 is provided with a solid nutritional body 32, in a solid form as a nutrient supply part for supplying nutrients that rear the algae and a body installed surrounding the nutritional body. The nutrients are supplied by elution thereof, from the solid nutritional body 32 to the outside of the body, and the body is constituted of an upper covering body 34 consisting of a base body 34A to be a base for algal adhesive leaves and a platy material 34B, lateral covering bodies 36 and a lower covering body 35. <；P>；COPYRIGHT: (C)2009,JPO&INPIT
