aside from my already crappy day, I come home to feed my fish krill and black worms. my little peru flower ray ate normally and nothing seemed out of the ordinary. a few hours later after dinner, I saw the ray splashing at the top which isnt completely out of the ordinary and then he sort of floated down sideways but landed on his belly and continued to swim normally. 10 minutes or so after that the front part of his disk curled up, but only the front. it wasnt the typical death curl. it was like he was opening his mouth to something in front of him like he would do to a piece of shrimp or worm, but instead he held the position. i had done my usual weekly water change the day before and the water parameters are their usual numbers. i go out with a few friends and come home to a dead ray with no death curl, no visible marks, and no signs of starvation whatsoever. i've had the ray for 2 months. so far, i see no reason why he passed... now im looking for peru flower rays again. this can be a frustrating hobby at times.