It has only just dawned on me what this thread was about! I was scratching my head for a while.
The plastic plants are not good in the aquaria as the edges of the 'leaves' are quite sharp (like razors). When some member of the public comes along and 'taps' heavily on the side of the tank the squid would react, darting backward, straight into the sharp foliage, cutting their rear end. An alternative does need to be found.
.... ney, not NG (or I hope not), but what wee ceph looking out of the telly are you referring to there SS Spartacus?
No Idea what that last sentence is about. Actually I told some kids the other day in a lab, not put their hands in the tank with the starfish... 'Take you're hand off, it will'. You should have seen them jump
Not to mention the.... hermit crabs who spit poison harpoons in your eyes if you get too close. (Ok, I stole that from Cone shells) and made up the rest. Still they were VERY impressed with the exploding whale movie from Oregon.