As the year comes to an end, it's time to look back at the oddest and simply most fascinating animals to make the headlines in 2012. There were zombie worms and turtles with a strange way of getting rid of urine. Following are the details:-
1. A 'tulip' with a digestive system
An ancient fossil found in Canada looks like a field of tulips frozen in stone. In fact, these plantlike creatures are animals unlike any seen before. Siphusauctum gregarium, a 500-million-year-old filter feeder, was the length of a dinner knife with a bulbous "head" containing a feeding system and a gut. Instead of filtering water past its feeders externally, S. gregarium appears to have pumped water through its tuliplike head, capturing any food particles that passed through. Scientists aren't sure where this unusual creature fits into the evolutionary tree.
Moving on to other ancient marine wildlife, here's a sea creature much scarier than an animal that looks like a flower. "Predator X," a giant marine reptile that was the top predator of the seas 150 million years ago, finally got its scientific name this year. Pliosaurus funkei, as it is now properly known, was 40 feet (12 meters) long with a 6.5-foot (2 m)-long skull.
This year, researchers studying the adorable gray mouse lemur (Microcebus murinus) in Madagascar came across a grisly scene: a male of the species feasting on the flesh of a dead female. Although other primates (including humans) have been known to practice cannibalism, scientists had never before seen a gray mouse lemur so much as eat another mammal.
4. A millipede with far too many legs
A white millipede that manages to cram 750 wiggly legs onto its 0.4-1.2-inch (1-3 centimeter) long body. Illacme plenipes is the world-record holder for "leggiest creature." It's found in only 1.7 square mile (4.5 square kilometer) area in northern California. Creature's closest living relative calls South Africa home. The millipedes may have spread out across the globe when most of the land on Earth was part of one supercontinent, Pangaea. When the supercontinent broke apart 200 million years ago, the relatives could have been separated, explaining the long-lost connection.
The Triassic Vorticella-like fossil (square in image focuses on the creature encased in cocoon) seen inside the cocoon wall. Like other eukaryotes, the Vortella animal was equipped with a nucleus, in this case a large horseshoe-shape nucleus inside the main body (C). Some 200 million years ago, a leech secreted a slimy cocoon under water or on a wet leaf, and a tiny animal the width of just a few human hairs attached itself to the new cocoon. This little creature clung on with its springlike tail, becoming rapidly trapped and engulfed by the cocoon. The unusual circumstances resulted in something almost unheard of: the complete preservation of a soft-bodied animal with no hard bones to fossilize. Scientists say the microscopic creature looks like it might come from the genus Vorticella. Its secret talent is coiling and uncoiling its springy stalk at a speed of 3.1 inches (8 centimeters) per second, the equivalent of a human getting across three football fields in that amount of time.
This year in the month of October, eight snakes with tentacles were born at the Smithsonian's National Zoo. It was not a Halloween prank. Zoo staff had been trying to breed the rare aquatic snake Erpeton tentaculatus for four years before success. These Southeast Asian serpents are the only snakes with two little tentacles on their snouts. These tentacles act like whiskers to help the snakes sense vibrations from swimming fish.
7. A beautiful, meat-eating sponge
Photograph of the recently discovered carnivorous harp sponge, Chondrocladia lyra, was taken in Monterey Canyon, off the coast of California, at a depth of about 11,500 feet (3,500 meters)
It looks like a harp or a delicate candelabra, but beware to any crustacean that gets too close: The so-called "harp sponge" will snare and slowly digest you before you know it. This creature had never been observed by human eyes before 2000, when a team from the Monterey Bay Research Aquarium Institute in California took a remotely operated submersible into 2-mile (3.5-km)-deep waters off the central California coast. They later captured two specimens of the animal, which is scientifically called Chondrocladia lyra, and took 10 more video observations. The sponges feed by clinging to muddy sediment on the ocean floor and letting ocean currents wash hapless tiny crustaceans into their harplike limbs. The candelabralike branches of the limbs may help maximize how many shrimplike critters these carnivorous sponges catch.
8. Zombie worms use acid to eat bones
If you need even more proof of the horrors of the deep, consider the zombie worm, which feeds off the bones of whales and other scavenged sea creatures, despite not having a mouth. This July, researchers at the Society for Experimental Biology's annual meeting announced that they'd figured out how this mouthless creature eats bone. It excretes acid. The acids allow the worms to break down and absorb the bone. But that's just the tip of the weirdness iceberg for these amazingly adapted worms. The females grow about an inch (3 cm) long, but males never grow larger than 1/20th of an inch (1 millimeter). They seem to live in the gelatinous tubes covering the females, serving no purpose but to fertilize her eggs.
A sharp-snouted turtle found in China often submerges its head in puddles on dry land, a mystery given that these animals breathe air. Now, scientists say they've figured out why: The Chinese soft-shelled turtle (Pelodiscus sinensis) can essentially pee from its mouth. The turtles excrete urea, the main component of urine, through the gills in their mouths, a talent previously seen only in fish. This may be an adaption to the turtles' salty environment. Because they can't get enough freshwater to wash urea out through their urine, they transport it through their gills and then rinse their urea-filled mouths out with saltwater.