Nothing strikes me out the norm. As far as eating, eels are better to eat on a gorge/fast schedule. It is how they eat in the wild and works with their natural metabolism. Feed them their full on feeding day, if you feed reasonably sized items they will not overeat, and will just refuse when full. That eel would only need to eat a couple a times a week at most, even up to every 5 days. When more mature eating once a week is more like it. They do need fasting time between meals and should get more active before offering food again.