ToonZone: A dangerous flu is spreading through Berk and Toothless is its latest victim.
DreamWorks Dragon Facebook Page: We know that dragons don't like eating eels but why is Hiccup fighting with one? and There's a reason dragons shouldn't eat eels! But you don't think eating an eel would make Toothless hurt Hiccup, do you?!
These are the only pictures of "The Eel Effect" so far, but if more show up they will be posted below. The next episode is called "Smoke Gets in Your Eyes" and will air on February 12.
Here's another image that was released earlier today (Thanks Nat!):