プレコFreq.FrequencyTop 100,000Meanings1nounpleco; plecostomusabbreviationCommon abbreviation for the algae-eating aquarium fish プレコストムス (plecostomus). Used in pet shops and by fish keepers.水すい槽そうにプレコを入いれて、コケを食たべてもらっている。I keep a pleco in the tank to eat the algae.