The Encyclopedia Americana (1920) - Fishes, Nest-making by: «... little sticklebacks, the males of which construct, in crevices of rocks, or among water-weeds, elaborate muff-shaped nests of small sticks and plant-fragments, woven together with glutinous threads spun from an organ connected with the kidneys. In such a nest the female then deposits her few and relatively large eggs...».
