Vocabulary

Tide Pools

Vocabulary

Terms & Definitions


  • aboral
    on a two-sided invertebrate, the surface opposite the mouth
  • algae — (s. alga)
    simple aquatic plants. Unlike other plants, algae have no roots, leaves, or stems.
  • calcareous
    containing calcium carbonate (a compound of calcium)
  • chelipeds
    a clawed thoracic appendage found in decapod crustaceans
  • chitin (KI-t'n)
    a hard substance in the external skeleton of arthropods
  • class
    a division of animal or plant classification. A class is a subdivision of a phylum.
  • crustacean
    an arthropod of the class Crustacea, including mostly aquatic forms such as lobsters, crabs, shrimps, and barnacles
  • detritus (de-TRI-tus)
    tiny pieces of dead and decomposing plants and animals
  • dorsal
    pertaining to the back or top surface of the body
  • ecosystem
    a unit of plants, animals, and non-living components of an environment that interact
  • environment
    one's surroundings
  • evagination
    the acts of pushing out, as when sea stars evert their stomachs during feeding
  • intertidal zone
    the shoreline area within the tidal range
  • invertebrate
    any animal that lacks a spinal column
  • gamete
    a male or female reproductive cell
  • kelp
    large brown marine algae, including giant kelp
  • marine
    related to the seas or oceans
  • oral
    of or pertaining to the mouth
  • order
    a division of animal or plant classification. An order is a subdivision of a class
  • papulae
    the tiny external respiratory organs of sea stars
  • parasite
    an organism that lives in or on, and feeds on, a host organism, harming the host
  • pedicellariae
    tiny, pincherlike projections found on the dorsal surfaces of some sea stars
  • phylum — (pl. Phyla)
    a division of animal or plant classification. A phylum is a subdivision of a kingdom.
  • piling
    a column made of wood, steel, or concrete that holds up a dock, wharf, or pier
  • plankton
    free-floating, microscopic plants and animals
  • predator
    an animal that eats another animal
  • prey
    an animal eaten by another animal
  • radula
    a ribbonlike structure bearing rows of teeth found in the "mouths" of many molluscs. The molluscs use their radula for rasping and scraping.
  • substrate
    the surface upon which an organism lives
  • sessile
    attached to the bottom or another hard substrate
  • territorial
    establishing and defending a particular territory
  • telson
    the last segment of the thorax of an arthropod or an extension of the last segment such as a scorpion's stinger or a lobster's tail fan
  • tidal range
    the difference between the highest and lowest tides
  • tide
    the rise and fall of the sea level along the coasts, caused by the gravitational pull of the sun and moon
  • uropods
    in some crustaceans, a flattened pair of appendages at the posterior end of the abdominal section
  • ventral
    pertaining to the underside or bottom surface