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invertebrates
Invertebrates
Invertebrates include those species that have no backbone. In fact more than 95% of all the animals on planet earth are considered to be invertebrates. Most of the species of invertebrates, around 80% of them, are included in the Arthropoda classification which also includes spiders, crustaceans, centipedes, millipedes and insects.
Annelid Polychaete worms - bloodworm User: Lycaon Image in public domain copyright has expired publication prior to January 1, 1923 |
 Scotoplane Image courtesy of www.planetoddity.com |
 Scotoplane Image courtesy of www.planetoddity.com |
 Humboldt Squid NOAA Public domain |
Marine invertebrates are animals that inhabit a marine environment and are invertebrates, lacking a vertebral column. Some have a shell or hard exoskeleton.
Annelids ("ringed worm") are a large phylum of segmented worms. There are more than 17,000 modern species, which includes ragworms, earthworms and leeches.
 Scotoplane Image courtesy of www.planetoddity.com |
Octopus vulgaris common octopus User: albert koks GNU Free Documentation License 1.2 |
 Scotoplane Image courtesy of www.planetoddity.com |