At first we thought we’d found a swim bladder, which would be extraodinary as sunfish aren’t thought to have them.
However, it turns out to be a really gelatinous mass of muscle, large and unusual looking.
Parasitic worms have been found inside the liver. It was expected that the sunfish will be home to a large number of parasites, and unfortunately for this sunfish it’s living up to expectations!
Watch sunfish science live!
Watch live 13 Aug 2013
It’s a fantastic opportunity to sit in as scientists do their research on these rarely seen animals. Don’t miss out!
Read our sunfish science blogs.
Use #sunfishtepapa to join in the conversation on Twitter.