Structure made from porous concrete and steel frame

・Porous concrete on top forms a seaweed bed
・Bed is raised off the sea floor, reducing the number of seaweed spores lost due to sand action.
・Interior of steel frame forms protective space for fish

Hemispherical porous structure

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・Countless irregularities create a large surface area that facilitates attachment
・Minute gaps help seaweed spores and other creatures settle
・Permeable design reduces clogging and accumulation of floating mud

Includes minerals that provide nutrition for seaweed

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・Supplies calcium made from fossil shells
・Supplies iron from steel fibers added to bed