Nature on PBS, how do I love thee?

Last night's episode of Nature dealt with the venomous, and sometimes deadly, creatures found in Australia. I learned a couple of things, and I post them here, well, because I can:

• According to the narrator, jellyfish are large nervous systems, with no brain.
  
• Jellyfish have multiple stomachs. Moo.
  
• There were a couple of guys that were catching a specific species, tagging it, and releasing it back into the wild. I have never seen that in my life.
  
• Now, I've seen spiny urchins before, but I've never seen them moving. Pretty cool, and intimidating looking--though it probably was time lapse photography, huh?
  
• Not only are there spiny sea urchins, but there's a flower urchin. Cool looking, but not very friendly.
  
• There's a snail with venom that causes almost instantaneous paralysis to its victim. It uses this venom to catch fish.
  

The close ups of the defense/offense mechanisms were amazing.

You know, considering all this about jellyfish, I wonder why in MTG, the Man-O'-War isn't more deadly. Silly card game.