March 21, 2018



Invertebrates are animals with no internal skeleton or backbone. Invertebrates make up about 95% of all animal species on Earth. Types of invertebrates include annelids, arachnids, cnidaria, crustaceans, echinoderms, insects, mollusks, and protozoa. Exceptions include amphibians, birds, fish, … [Read more...]


Arachnid, Spider

Arachnids are defined as invertebrate animals that have eight legs. However, in some arachnids the front pair of legs may have adapted for feeding, defense, and sensory perception rather than walking. Almost all arachnids live on land, although some live in freshwater areas. There are over 100,000 … [Read more...]