Andy Lister said:I think that it could be a case of bad diet from birth.
I do a lot of Seahorse breeding and have recently started breeding Hippocampus reidi, they live happily and grow fantasticly for around 3 months and then they all die, religiously... over the space of around 1 week I can lose hundreds.
Some were sent hor histology and turns out they are filling themselves up on artemia nauplii and not on the copeopods. With seahorses not having stomachs (a little problem) and the artemia being of very little use as a good source of nutrition we changed to diet to copeopods and nothing else and they are fine now and have been around for about 7 months! YAY
In short, they may eat fine to start with but they may eat some of the wrong food and have no room left for something thats actually nutritious.