Leaving aside invertebrates, which are often microscopic, the smallest land vertebrate is Paedophryne amauensis. This tiny frog was discovered in the jungles of New Guinea, and adults are only 0.27 inch long. More »

The largest animal is the blue whale, Balaenoptera musculus, which grows to a maximum of 110 feet long. The smallest animal is the crustacean Stygotantulus stocki, which grows to 94 micrometers, or less than 0.004 inches... More »

The smallest animal on earth is the tardigrade. The tardigrade is also known as the moss piglet or water bear. More »

A coral reef's food chain starts with algae that produce food from water, carbon dioxide and sunlight, which are eaten by microscopic organisms, invertebrates, fish and turtles, which are eaten in turn by predators. All ... More »

Stoneflies do most of their eating while they are in the larval stage, during which time they capture and eat other small insects and invertebrates. The adult stage of a stonefly's life cycle is primarily concentrated on... More »

Vertebrates and invertebrates are similar in a lot of ways. Both are multicellular animals that can reproduce. They both also possess appendages, nerve chord, and have their mouth and head at one end plus anus and reprod... More »

www.reference.com Science Biology

Open circulatory systems are found in mollusks, arthropods and several other invertebrates. Open circulatory systems work by pumping blood into a hemocoel, which in turn diffuses blood and pumps it back into the circulat... More »