The venomous mangrove snake that escaped its enclosure at the Bronx Zoo was still loose Tuesday — marking a week since it went on the lam.

The 3-foot, tree-climbing serpent got free from its Jungle World exhibit Aug. 6 — when zoo officials claim it escaped via a mesh-covered vent in its glass case — and was still nowhere to be found Tuesday.

Concerned guests were assured it was still safe to go inside Jungle World, with one ticket vendor even joking to several scared children: “If you see him, let us know!”

But after a fruitless week-long search, staff admitted the fanged fugitive could be anywhere by now — with one administrator at Jungle World saying she thinks it might be somewhere else in the zoo.

And at least one employee said he hopes it stays that way.

“I’m an animal lover so I’m rooting for the snake!” said the worker, who didn’t even learn of the escapee until The Post broke the news last week. Another employee said she found out from her concerned grandma, who texted her to ask if she was OK.

The mangrove snake has now been missing as long as the deadly Egyptian cobra that escaped the zoo in 2011 — and was found a week later.

There have been no known mangrove snake fatalities but their venom can cause painful swelling, according to the Smithsonian’s National Zoo & Conservation Biology Institute.

Mangrove snakes hunt a wide variety of prey including other snakes, birds, lizards, bats and frogs — species that all reside at the zoo.