NOVELTY - A fermented biological organic fertilizer comprises (kg) albumen powder (210), oil cake (190), dry chicken manure (370), microelement (10), fermentation bacterium (8), grass meal (100), dry earthworm (12), calcareous shale (3), brown sugar (3), rice bran (5), and bentonite (100).    USE - Fermented biological organic fertilizer adaptable to finless eels and oriental weatherfish (claimed) used for promoting growth of unicellular algae, and improving immunity and suppressing disease caused by bacteria in finless eels and oriental weatherfish.    ADVANTAGE - The fertilizer comprises multifunctional fermentation bacterium as core and good-quality organic matter as carrier to provide quick growth promoting effect of algae and adjust water environment via the beneficial bacteria and the good algae, realizing healthy and ecological growth of finless eels and oriental weatherfish. The grown finless eels and oriental weatherfish have fleshy and tender texture. Further, the fertilizer can efficiently degrade harmful substance and improve water quality.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the fertilizer, comprising:    (A) adding water (45-50%) into albumen powder, oil cake, dry chicken manure, fermentation bacterium, grass meal, and brown sugar, mixing them uniformly, adding rice bran and dry earthworm after the brown sugar is dissolved into the water and mixing them uniformly, and carrying out open aerobic fermentation to treat the mixed material;    (B) carrying out aerobic fermentation treatment for 48 hours, uniformly adding calcareous shale into the material, and crushing the material and turning the material for the first time;    (C) carrying out aerobic fermentation treatment for 96 hours, uniformly adding bentonite into the material, and turning the material for the second time;    (D) carrying out aerobic fermentation treatment for 168 hours and ending fermentation to obtain material having moisture content of less than 25%;    (E) crushing the fermented material through a screen-free crusher, uniformly adding microelement into the crushed material and mixing them uniformly; and    (F) feeding the material into a pelletizer to be pelletized to obtain the fertilizer.