There are many Sharpteeth, or carnivorous creatures in The Land Before Time. They are usually the main antagonists of the movies, sequels, and series, while a select few others, such as Chomper, are protagonistic. The most common voice for Sharpteeth is Frank Welker. Others include Danny Mann, Pete Sepenuk, and even Rob Paulsen.
This is a list of the various Sharpteeth seen throughout the series, in order of appearance.
Metriorhynchus - A Metriorhynchus appears chasing a fish in the introductory sequence of the film.
Sharptooth - A dark green Tyrannosaurus; the main antagonist of the first film. He is inadvertently blinded in one eye by Littlefoot. He is responsible for killing Littlefoot's mother. He chases the main characters during the film until they push a huge rock on him, causing him to fall into a lake and drown.
Tyrannosaurus - A dark green Tyrannosaurus appears at the beginning of the movie during the opening narration. It bears resemblance to the original Sharptooth and, even more so, Chomper's father.
Nothosaurus - A Nothosaurus lurks in a swamp that the main characters investigate.Chomper - A baby Sharptooth who befriends the main characters after his egg is brought to the Valley by mistake. He is the only Sharptooth who is friendly. Chomper's Father - A dark green Tyrannosaurus. He invades the Great Valley with his mate while searching for Chomper. His coloration is similar to that of the original Sharptooth's.
Chomper's Mother - An olive green Tyrannosaurus. She invades the Great Valley with her mate while searching for Chomper.
Unquillosaurus pack - These were the first known Fast Biters to appear in the franchise. During the introduction of the third, the scene about evolution fades from the Devonian to the Mesozoic, where an Unquillosaurus is drinking from a river. The individual then notices its pack members coming towards it and thus follows them over the river.
Dromaeosaurus pair- Also during the introduction of the film, two Dromaeosaurus (one blue, another brownish) are seen surrounding a Chasmosaurus. The brown one leaps at the ceratopsian before the scene fades to the Great Valley. It is unknown what became of any of them.Velociraptor pack - When the dinosaurs in the Great Valley came to the Mysterious Beyond to get their water back, they were attacked by a pack of four Velociraptor. While they fought back, one was knocked out by a rock and possibly killed, while the remaining three were separated from the leafeaters by a river.
Ichy and Dil - An Ichthyornis and Deinosuchus who side with each other to catch prey. The two don't like each other much, but stay together because of their handicaps: Dil's being sight and Ichy's being size. Though they are possibly sharpteeth, they are categorized in a different term.
Hydrotherosaurus - A large male Hydrotherosaurus attacks Dil after she bumps into him, chasing her away. He is one of the few Sharpteeth who didn't chase after Littlefoot and his friends.
Barracuda - An aggressive carnivorous fish that dwells in ocean waters. When the Prehistoric Pals used a log as a raft to get back to the main land, a barracuda jumped out of the water numerous times trying to eat Ducky.
Chomper - The five main characters meet Chomper on an island while searching for enough food to feed the herds. Now old enough to talk, Chomper helps them get around the island and protects them from his parents.
Chomper's Father - Chomper's father appears again along with his mate. He has a sense of humor, but is also antagonistic at one point, picking up the scent of Littlefoot and nearly finding him and his friends.
Chomper's Mother - Chomper's mother appears again along with her mate. She is very caring towards her son, and can be very defensive, roaring right behind Littlefoot to make sure Chomper is safe.
Although the two Tyrannosaurus are not the main antagonists, Chomper tries to help keep his friends safe from them.
Plated Sharptooth - A Giganotosaurus who appears on the same island as Chomper's family. Unknown to them at first, he chases the main characters and later attacks Chomper's parents when they try to protect him. He may have crossed the land bridge connecting to the island, and likely did not live there.
Postosuchus - A crocodilian-like sharptooth that lived during the time of the dinosaurs. In the intro to the movie, one Postosuchus is put as an example of early life that rose out the water for life on land."The Biggest, Meanest, Most Ferocious Sharptooth Ever" - A legendary Sharptooth that the Lone Dinosaur defeated. His teeth are said to be the same ones around the neck of Saurus Rock.
Tyrannosaurus - A male Tyrannosaurus that fights alongside the Allosaurus while the characters are in the canyon. He supposedly dies along with the male Allosaurus when Grandpa Longneck and Doc supposedly brings down a pile of rocks on top of the two sibling Sharpteeth completely burying them alive.
Swimming Sharptooth - A Liopleurodon that is washed into the Great Valley along with Mo in a flood. He serves as the main antagonist until he reaches the Big Water and forgets about the main characters.
Postosuchus - These quadrupedal Sharpteeth inhabit a swampland.
Sarcosuchus - A Sarcosuchus that lives in a marsh attacks the Longneck herd that migrates through, almost eating Littlefoot, but is crushed by Sue. Later, Littlefoot's friends also face off against it, and it almost eats Petrie. Like Ichy and Dil this creature is dubbed by a different term.
Gray Tyrannosaurus - A gray Tyrannosaurus that lives in a swamp. Cera, Ducky, Petrie, and Spike at first mistake him for a boulder and sleep next to him. He wakes up when the children start talking and chases them. He later attacks the characters with two other Sharpteeth.
Green Tyrannosaurus - One of the Sharpteeth that attacks the characters when they find Littlefoot.Orange-Brown Tyrannosaurus - He chases the kids while they are trying to find Littlefoot. He attacks Pat who tries to help the children escape. Some believe he is the leader of the pack.
Postosuchus - One appears in the introductory sequence of the film, roaring on a cliff, but dying of apparently natural causes.
Baryonyx pack - A pack of Baryonyx that attack the children when they are trying to help Loofah, Doofah, and Foobie escape. The pack supposedly were killed when they stood on the edge of a cliff and it shattered under their weight, causing them to fall.
Featherhead Sharpteeth - A pack of Yutyrannus that attack the children at points in the film. Though their attempts to eat the children are initially foiled due to the pair being unable to find the five juveniles, they eventually become active threats after they mistakenly dispose of their defenses. They are ultimately defeated during a spat on a high ledge; the pale green individual being tripped off of a small cliff, and the olive one being smashed by a multitude of boulders and frightened away.
Horned Sharptooth - A Carnotaurus that appears as the more dangerous antagonist of the film. He briefly appears to attack Cera, Ducky, Petrie, and Spike while they are separated from Littlefoot. He later appears again searching for easy prey, and nearly discovers Grandpa Longneck, Mr. Threehorn, Wild Arms, Chomper and Ruby, before being distracted by a passing flock of Archaeornithomimus, which he chases after.Red Claw - The main antagonist of the TV series. According to Chomper, he is the biggest and meanest Sharptooth in the Mysterious Beyond. He and his minions Screech and Thud appear to rule the area outside the Great Valley. He separated Chomper and Ruby from their families.
Torvosaurus Family - A family of Torvosaurus, consisting of a child and two parents. When Chomper is on a mission to teach Sharpteeth how to be "nice", he tries to become friends with the child, who is around his age. The child however doesn't understand him talking in leafeater and acts aggressively towards him. He finally gets his parents who chase Chomper away.
Sharptooth Mom - A mother Utahraptor who lays eggs in a cave by the Great Valley. She chases the main characters as they carry her eggs to the Mysterious Beyond.