re use of giant cyclops from lost in space

Several LIS monsters did double time "underwater" in VTTBOTS, for example "Deadly Creature Below", "The Menfish", "The Thing From Inner Space", etc.

I know CYCLOPS was seen running out of LIS's KEEPER spaceship, I know CYCLOPS was used - for a second or two - as a "pretend costume" in a season one LAND OF THE GIANTS episode.

But I am 99% sure CYCLOPS never appeared in VTTBOTS. Perhaps another regular poster on this board could confirm that for me?

I'm in agreement with StuOz. I'm pretty sure the Cyclops costume was never used on VTTBOTS. You might be thinking of the episode "Leviathan." After Liam Sullivan turns into a giant and fights the Seaview underwater they added big ugly teeth and such to his face which may have made him seem reminiscent of the Cyclops face.

Let me clear up the situation with the "Lost in Space" Cyclops and "Voyage to the Bottom of the Sea". The Cyclops was a very elaborate costume designed by Paul Zastupnevich. He made it from the bark of several palm trees that were torn down by the LA County Fire Department(for brush clearing). Because it was such an impressive costume there were a number of publicity photos taken of the monster, some with the cast of Irwin's then current series, "Voyage to the Bottom of the Sea". You may have seen a picture of David Hedison standing in a boxing pose with the Cyclops in an issue of 'Famous Monsters' magazine. There are a number of variations on that shot, and one of them I've seen has the Cyclops standing on a milk crate because the guy in the monster costume really isn't much taller than Hedison! But the Cyclops was never used in an actual episode of "Voyage".

That's why there is the confusion about the Cyclops having appeared on "Voyage". However, there were a number of other monsters that were shared between "Lost in Space" and "Voyage", one being the 'seaweed monster'. It was first used in "Deadly Creature Below" and then made an appearance as a humanoid-sized monster in the LIS episode, "The Raft". And of course there as the "Menfish" costume that was reused in "A Change of Space". There were a few others, but those are the ones I remember from the top of my head.