All of the deceased dolphins were discovered in Lake Tefé over the previous seven days. (Photo : by Maxx Wolfson/Getty Images for IRONMAN)KAILUA KONA, HI - OCTOBER 13: A dolphin swims in the water during the IRONMAN World Championships brought to you by Amazon on October 13, 2018 in Kailua Kona, Hawaii.
All of the deceased dolphins were discovered in Lake Tefé over the previous seven days. (Photo : by Maxx Wolfson/Getty Images for IRONMAN)KAILUA KONA, HI - OCTOBER 13: A dolphin swims in the water during the IRONMAN World Championships brought to you by Amazon on October 13, 2018 in Kailua Kona, Hawaii.