I am just not sure….what he expired from. The 2 Oceanrider seahorses seem to be doing well…and the the female I had bought from my LFS, will not be doing that again. They are eating with great appetites, so I tend to wonder if he was wild caught? or just refused to eat the frozen. I want to buy another pair. Curious about our hot weather. would I be better to wait until the fall to get them?