Grzimek's Student Animal Life Resource: Corals, Jellyfish, Sponges and Other Simple Animals
Grzimek's Student Animal Life Resource: Corals, Jellyfish, Sponges and Other Simple Animals offers readers comprehensive and easy-to-use information on Earth's animals. Entries are arranged by taxonomy, the science through which living things are classified into related groups. Each entry includes sections on physical characteristics; geographic range; habitat; diet; behavior and reproduction; animals and people; and conservation status. Family entries are followed by one or more species accounts and a range map and photo or illustration for each species. Entries conclude with a list of books, periodicals, and Web sites that may be used for further research.
This volume of Grzimek's Student Animal Life Resource: Corals, Jellyfish, Sponges and Other Simple Animals includes a pronunciation guide for scientific names, a glossary, an overview of birds, a list of species in the set by biome, a list of species by geographic location, and an index. The volume has nearly 200 full-color maps, photos, and illustrations to enliven the text, and sidebars provide additional facts and related information.
sea bottom during the day and move toward the surface at night. DIET Box jellies eat fish and crustaceans (krus-TAY-shuns), which are water-dwelling animals that have jointed legs and a hard shell but no backbone. BEHAVIOR AND REPRODUCTION Because box jellies can see, they are difficult to study because they react to the presence of their human observers by swimming away. Box jellies are active swimmers capable of moving 10 to 20 feet (3 to 6 meters) per minute. They move toward light and are
active during the day and night, although they may feed only during the night or predawn hours. Box Jellies 53 KNOW YOUR STINGER Although it keeps undischarged box jelly stingers from firing, vinegar stimulates stinger firing from other jellyfish. DEADLIEST The sting of a box jelly can kill a person in thirty seconds. The venom from one sea wasp can kill sixty adults. The life history of box jellies has two stages: bottom-dwelling polyp and freely swimming medusa. A polyp (PAH-luhp) is a body
freshwater. A. priodonta rotifers eat algae, other protists, and other rotifers. Behavior and reproduction: A. priodonta rotifers produce sexual and asexual females. Fertilization takes place inside the body. These rotifers also may have a third type of female, which can produce eggs that hatch into asexually producing females and eggs that hatch into dwarf males. 118 Grzimek’s Student Animal Life Resource Asplanchna priodonta and people: A. priodonta rotifers have no known importance to
Grzimek’s Student Animal Life Resource RAT LUNGWORM Angiostrongylus cantonensis Physical characteristics: Adult rat lungworms are 0.8 to 1.3 inches (20 to 34 millimeters) long and 0.01 to 0.02 inch (320 to 560 micrometers) wide. The females are larger than the males. Geographic range: Rat lungworms live all over the world in warm areas. Because they are found throughout the world, no distribution map is provided. Habitat: The primary hosts of rat lungworms are rats. The intermediate hosts are
resting-stage larvae that shed their outer layer and transform into adult males or females. GIRDLE WEARERS AND PEOPLE Scientists may be able to use girdle wearers as indicators of pollution. CONSERVATION STATUS Girdle wearers are not considered threatened or endangered. Girdle Wearers 173 Bucket-tailed loriciferan (Rugiloricus cauliculus) SPECIES ACCOUNT BUCKET-TAILED LORICIFERAN Rugiloricus cauliculus Physical characteristics: Adult bucket-tailed loriciferans (LAW-ruhSIH-fuh-ruhns) are