Bat eagle ray

The maximum disc width reported for the bat ray is 6 feet (180 cm) with a maximum weight of close to 200 pounds (91 kg). At birth, young bat rays have a disc width of approximately 1 foot (.3 m). Typically, females grow larger than males, reaching weights of up to 200 pounds (91 kg). Bat rays are known to live at least 23 years. Males reach maturity at disc widths of approximately 26 inches (67-68 cm) and weights of 10 pounds (5 kg) while females mature at larger widths than males and weights of at least 50 pounds (23 kg). Age of maturity varies between 5 and 6 years for females and 2 years for males.