YES, they can open lids!

[Laurie LeAnn]

My large / jumbo crab opened the glass lid today and got out! I had piece of wood that went up towards the tank and he had climbed up, hooked his claws on the top I'm assuming and pulled himself up and pushed it up. I heard a bunch of racket but just thought he is being rammy trying to get to the other side of the tank cause I have it blocked off..it's mating season.. ya...I got up to go to the kitchen and there be sat on top of the tank!!!! It's now been rearranged and has been duct taped down. He has tried to go back and climb where he got out..rude awakening.

[Rawrgeous]

What a naughty crab! I had that paranoid thought about Mrs. Robinson.....glad I put a big book on each side.

[mool]

I have a heavy block of wood on both lids to prevent such happenings. I'm glad you found yours right away!

[Giner13]

Scary!!
I generally keep all climby toys down enough where my small/mediums can't reach....is that enough prevention??


Sent from my iPhone using Tapatalk

[Crabinski]

My large fella, Big Enzo, managed to push up under the plastic strip at the rear of the glass lid and escape to the top of the tank twice . Attaching the strip to the back of the tank with clear packing tape ended those forays. He's tried many times to lift the front edge of the hinged lid with his shell but without success: thankfully, it's too heavy!