sentence: Arms are grown within a short time of coming out of their egg.
sentences_before: The larvae are entirely aquatic, and are characterized by large gills on the outside and a big tail fin that begins just behind the head.
sentences_after: Some larvae, especially in pools that are here one season and gone the next and in the north, may metamorphose as soon as feasible. These are known as small morph adults. Other larvae, especially in ancestral pools and warmer climates, may not metamorphose until fully adult size. These large larvae are usually known as waterdogs, and are used many times in the fishing bait and pet trade. Some populations may not metamorphose at all, and become sexually mature while in their larval form.
concept_name: arm
headings: Tiger Salamander Description