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Horseshoe Crabs on Beach
Rock boring urchin, Echinometra mathaei, nestled in a crevise of a tide pool. The urchin uses it jaws to enlarge the hole as it grows. Ko Olina, Oahu, Hawaii.
Starfish and sea urchins in a bucket with saltwater for scientific sampling
Horseshoe crab in the ocean, Rio Lagartos, Yucatan, Mexico
Photo taken in Naples, United States
A Background of Kina Shells with differential focus. The focus is on the top Kina Shell. This photo is in soft focus.
Fossilized sea urchin, often found on Baltic Sea cliffs, offers insights into past marine life, a remarkable discovery in coastal landscapes.
Colorful sea stars and hermit crabs in Seward, Alaska
Treasure of nature
This image shows several sea urchins, with one opened to reveal its bright yellow insides. The sea urchin's shell is covered with black spines, creating a sharp contrast. The background consists of light-colored ice, highlighting the details of the sea urchin.
Atlantic Horseshoe crab Limulus polyphemus walks along the white sand of Clam Pass Beach in Naples, Florida in summer.
Cuttlefish bone washed ashore on a sandy beach. The picture is taken on the beach on Palau Selingan also known as Turtle Island in Malaysia
A horsehoe crab sitting on the beach.
Dried sea stars
horseshoe crab in a shallow water of Atlantic ocean
Leather sea star, Dermasterias imbricata, Channel Island, Prince William Sound, Alaska.
Scores of horseshoe crabs wash ashore Delaware Estuary beaches each spring to spawn.  Their eggs are a vital food source for migrating shorebirds.
Pink seastar in a tidal pool
Animals/Wildlife, Nature  Parks/Outdoor
A close-up view directly above an orange colored starfish and a green sea urchin shell in bright sunlight on a dry sand beach.
A horseshoe crab sitting on the beach.
Background of Kina Shells with differential focus. The focus is on the top Kina Shell. This photo is in soft focus.
This photo was taken in the northwest part of Long island New York  in the Wildwood State Park. in the photo there is a dead  horseshoe crab that washed up on shore, the exoskeleton makes it seems like it is alive but the interior of the body is empty.  horseshoe crabs are one of the oldest in the animal Kingdome to almost not go through any evolutionary changes for around 450 million years.
Shell collection: shells of various colors, decorations
Limulus polyphemus  (lat.- Xiphosura) The Xiphosura are an order of marine chelicerates that includes a large number of extinct lineages and only four extant species in the family Limulidae, which include the horseshoe crabs. The group has hardly changed in millions of years; the modern horseshoe crabs look almost identical to prehistoric genera such as the Jurassic Mesolimulus, and are considered to be living fossils. The most notable difference between ancient and modern forms is that the abdominal segments in present species are fused into a single unit in adults.
Under surface of a Bat Star, Asterina miniata, Monterey County, California. Showing the rows of tube feet.
Horeseshoe crab on it's back on a beach with barnacles
Sea Urchin Echinoderm shell texture. Underwater Sea life,  Macro abstract. Blue sea in  background.
Animals that live in a tide pool
Nice sea shell on the sandy beach
Free Images: "bestof:Horseshoe Crab (Left); Common Starfish (Right); Green Sea-Urchin (Below).jpeg Horseshoe Crab Left ; Common Starfish Right ; Green Sea-Urchin Below Subject"
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