Howells, Robert G.2010-02-152010-02-151999http://hdl.handle.net/1969.3/26039370 pgs.In 1967 the 60th Texas Legislature instructed the Texas Parks and Wildlife Department (TPWD) to determine which fishes were harmful or potentially harmful, and to list and regulate these species. Such a list was ultimately established and has evolved through the years to the present. This publication is the 1999 edition of the list regarding identification of harmful or potentially harmful fishes, shellfishes, and aquatic plants in Texas.fishesshellfishaquatic plantsnonindigenous pestsinvasive speciesenvironmental lawlegislationexotic fishesexotic plantsnature conservationBook