Unusual (Diseased?) Crab Tissue

A side note from today's crab dissections: I came across a crab with interesting and different muscle tissue from the others. The crab was the same species as the others, Thalamita crenata, but its muscle tissue had a foul smell and was white and gooey, unlike the normal clear greyish tissue. I have no idea what this is, but I thought it was intriguing and want to share. Was it something he ate?

Crab leg with foamy white muscle tissue.

"Diseased" muscle tissue, at left, next to a normal sample.