I would imagine there would be. One of the bigger challenges of eating an animal that lives in a very different environment is that its composition could be very different. But fresh water fish have a fairly similar composition to sea water fish in terms of their ion content, for example, which is something we're quite interested in. The specific fatty acids, for example, that are building blocks for things like omega-3 fatty acids that we know a lot about, and omega-6 fatty acids, may differ, but it seems to me that it would be a completely reasonable line of research to at least pursue. If we can feed them plant-based protein, I would think a fish-based protein would only be better.
On December 8th, 2011. See this statement in context.