sea urchins

Contains photographs and information about the lives and behaviors of starfish and urchins.

Presents an introduction to echinoderms, in simple text with illustrations, including starfish, urchins, sea cucumbers, lancelets, and others, providing information on their physical characteristics and abilities, habitat, behavior, and life cycle.

A simple introduction to the physical characteristics, life cycle, and habitat of sea urchins and related species.

An introduction to sea urchins, their habits, and their habitats.

Text and photographs provides descriptions of the physical characteristics, habitat, behaviors, and life cycle of sea urchins.

Contains, illustrated, alphabetically arranged entires that are related to small, spiny animals, from the ants that echidnas eat, to the zooplankton that are made up of sea urchin larvae. Includes glossary.

Photographs and simple text describes what sea urchins are, what they look like, and what they do.

Presents a short study of sea urchins, what they look like and where they live, the various species of sea urchins, their life cycles, and other interesting facts about them.

Defines echinoderms, such as sand dollars and crown-of-thorns sea stars, and describes their physical characteristics, life cycles, habitats, sense, food, and means of self-defense.

Provides information about sea urchins, explaining what they are, what they look like, where they live, and how they feel, use their spines, move, and eat.