This shirt isn’t for people who keep a patio tub for decoration.
It’s for keepers who overwinter Oryzias latipes and track their spawns by strain.
Platinum medaka viewed from above, schooling beneath Lemna and dwarf water lettuce in a half-barrel layout that mirrors the way you actually check a colony.
It belongs at the fish room sink, beside the outdoor tubs, or across the table at a club meet where someone notices the メダカ before they ask about your line.

