I had a feeling . While he was eating well and for a week or so was interacting with us, from the beginning I noticed when he was at rest, the curlycue look to the end of his arms. I had hoped this was not a pending sign he would not last but it seems to be one of the symptoms of impending death. I think he was an adult when I bought him as he was the same size if not a little bit bigger than Squiggles, who is still vigilantly guarding eggs. So I have a tank full of food in my kitchen. It looks like the bottom of the river. Very active.