Sea urchins

Sea Urchin Sea urchin, any of about 950 living species of spiny marine invertebrate animals (class Echinoidea, phylum Echinodermata) with a globular body and a radial arrangement of organs, shown by five bands of pores running from mouth to anus over the test (internal skeleton). The pores accommodate tube feet, which are slender, extensible, and often sucker-tipped. From nodules on the test arise long, movable spines and pedi cellariae (pincer like organs); these structures may have poison…

Sea urchin's shell, about an inch and a half in diameter. Stacked 4 macro shots to get focus from the top to bottom.

Sea urchins or urchins are typically spiny, globular animals, echinoderms in the class Echinoidea. About 950 species live on the seabed, inhabiting all oceans a...

Sea Urchin

Australian Museum on Instagram: "Ever spotted one of these spiky-looking creatures on a swim? 🌊 Sea urchins are a kind of echinoderm that can be found across all of the world’s oceans and are an incredibly important part of the ocean’s biodiversity. In Sydney, we’re lucky enough to have an amazing diversity of sea urchins with over 40 species recorded to date. Research suggests that some sea urchins can live up to 80 years in the wild! Find out more about Sydney’s sea urchins via the

Photos of Sea Urchins - Echinoidea

Another wtf moment! This is “Sputnik” made from a spiny sea urchin shell. Yes it is a real sea urchin! 😬 I created a sea monster awhile…