Tarantulas are easy to care for, and their fearsome reputation is vastly exaggerated. In fact, many people find they make great pets.

"I hear it all the time: What are you doing with those around? What if it got out? It could kill somebody," said Mark Jones, who with his wife, Beth, runs Chaos and Critters exotic animal rescue in Mobile, Ala.

But in fact, these large spiders aren't as dangerous as that.

"They will not kill you," Jones said. "You'd have to have a severe allergy to insect venom. Some of them, the bites are no worse than a mosquito."

Some species have hairs that they use as defense; these are extremely irritating, and you especially don't want to get one in your eye. But aside from this caution, tarantulas are interesting and low-maintenance pets.

"A well-fed and -watered tarantula can be left for a month when you go on vacation," said Michael Jacobi of tarantulas.com, a breeder and dealer with 25 years of experience.

On a routine basis, tarantulas need little more than a spritz of water to maintain humidity in their enclosure and a few crickets once in a while. And they don't need large cages, so they don't take up much space.

"They're a very nice pet for people who don't want to bothered with something running around, getting on the furniture, making a lot of noise," Jones said. "They have no odor whatsoever."

OK, so they aren't much work -- but what's the payback? You can't cuddle them, and they won't come when you call their name. But according to Jones,"They're great observational pets. Some of them construct extremely elaborate webs. Some of them excavate a tunnel and construct a trap door over it."

Linda Rayor, professor of entomology at Cornell University in New York, agreed.

"Just like you're not petting your fish, you're not going to be petting your tarantula. But they're interesting to watch," she said. "Tarantulas are calming for me in the same kind of way."

What makes them great to observe, Rayor said, is that they are wild animals that behave fairly naturalistically in captivity, including their feeding behaviors. "They're predators. I like watching tarantulas capture prey."

And their owners say they are beautiful.

"There are lots of different colors and different varieties," Jacobi said. "There are 850 species of tarantula, and well over 100 available [as pets]."

Even just the names can be lovely: who could resist a Pink Zebra Beauty?

Rayor and Jacobi recommend not handling your tarantula -- even if a bite won't kill you, handling stresses the animal, and it can easily die from a fall. But if you're careful, they can live for years, as long as you're aware of one crucial fact: a spider that is in the process of molting lies on its back, looking quite dead.

"Don't throw it out," Jones said. "If your spider's lying on its back, leave it there for a week. It's the only way to be sure."

As a species for beginners, Rayor recommends the strikingly marked Mexican redknee and its relations. They are "just great, reasonably active, not aggressive. All the things you want in a nice tarantula."

And according to Jacobi, all redknees are captive-bred -- they are a protected species and can't be collected from the wild -- so there are no environmental concerns about owning one.

"Spiders are way cooler than they are creepy," said Rayor, who does educational programs on spiders for schools.

Demand is high around Halloween, he said, but the creepy aspect can be part of the fun. At a Block Island, R.I., bar, the establishment's mascot is a Brazilian bird-eating tarantula called Itchy, according to manager Kate Musso.

"Everyone is freaked out by it," she said.

Even so, Itchy needs some help if he's really going to terrify people.

"We bought a fake remote-controlled tarantula and we can make it run across the bar. We show people the real one and then they turn around and see the fake one," said Musso. "Grown men scream like little girls."