Despite the last two cases, you're still eating fish for dinner. This time, on a trip to Japan, you try a local delicacy. Within minutes of eating the dish above, you note weakness, dizziness, paresthesias of the face and extremities, and nausea. Since you always carry around a trusty reflex hammer, you test your reflexes and find they're absent. The fear with this disease is paralysis and hypotension. The toxin is shown below. Cool ring structure!
Challenge: What's your diagnosis?
First image shown under Creative Commons Attribution License. Second image is in the public domain.