Now you see it ... the Cape Melville leaf-tailed gecko from northern Australia blends in with the boulder fields where it lives.
Spiculosiphon oceana, a bizarre single-celled protist that builds a shell out of the discarded skeletal pieces of marine sponges.
Although it is only made of one cell, spiculosiphon grows to be 1.6 inches (4 cm) long.
Clean Room Microbes
Tersicoccus phoenicis, a microbe found independently in separate clean rooms. This microbe survives all manner of sterilization attempts.
Tinkerbella nana, a parasitoid wasp that measures only 0.00984 inches (250 micrometers) long and lives in Costa Rica.
A domed land snail Zospeum tholussum in the Lukina jama-Trojama cave system in Croatia.
The snail lacks pigmentation and has no eyes, thanks to its pitch-black cave habitat.
Snails in Cave
The transparent domed land snail moves only a few centimeters a week at most, mostly grazing in circles.
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Stephanie Pappas is a contributing writer for Live Science, covering topics ranging from geoscience to archaeology to the human brain and behavior. She was previously a senior writer for Live Science but is now a freelancer based in Denver, Colorado, and regularly contributes to Scientific American and The Monitor, the monthly magazine of the American Psychological Association. Stephanie received a bachelor's degree in psychology from the University of South Carolina and a graduate certificate in science communication from the University of California, Santa Cruz.