Best Sea Urchin

Strongylocentrotus franciscanus, commonly known as the red sea urchin, is a species of marine echinoderm native to the shallow coastal waters of the eastern Pacific Ocean. Its geographical range extends from Alaska down to Baja California. The species is distinguished as the largest of all sea urchi...

The purple sea urchin (Strongylocentrotus purpuratus) is a marine echinoderm found along the eastern Pacific coast from British Columbia to Baja California. Described by William Stimpson in 1857, it inhabits rocky intertidal and subtidal zones and feeds primarily on kelp and other algae. Its genome...

The long-spined sea urchin (Diadema antillarum) is a species of echinoderm found in the shallow waters of the Caribbean and the western Atlantic Ocean. It is characterized by its black, hollow, venom-tipped spines, which provide defense against predators. As a primary herbivore, it plays a vital eco...

Paracentrotus lividus is a species of sea urchin found in the Mediterranean Sea and the eastern Atlantic Ocean, officially described by Lamarck in 1816. It is recognizable by its spherical, spiny shell, which usually presents a dark purple or brown coloration. The species is ecologically significant...

*Toxopneustes pileolus*, or flower urchin, is a regular sea-urchin belonging to the Toxopneustidae family. It’s notable for its venomous spines and distinctive flower-like appearance. This extant echinoderm inhabits shallow coastal waters of the Indo-Pacific region and is often found near coral reef...

Strongylocentrotus purpuratus, commonly known as the purple sea urchin, is a species of echinoderm found in Pacific coastal waters. It’s notable for its well-studied biology and serves as a key model organism within marine research. Scientists utilize this regular sea urchin, belonging to the Strong...

Mesocentrotus franciscanus, commonly known as the red sea urchin, is a regular echinoderm belonging to the Strongylocentrotidae family. It inhabits kelp forests along the Pacific coast of North America. This species is notable for its size and commercially harvested roe, which is consumed globally....

The red sea urchin (Mesocentrotus franciscanus) is a large echinoderm species native to the northeastern Pacific Ocean, ranging from Alaska to Baja California. It inhabits rocky seafloors and kelp forests, where it grazes heavily on macroalgae. Recognized as the largest species of sea urchin, its sp...

Diadema antillarum is a regular sea-urchin belonging to the Diadematidae family and found throughout the Caribbean. This extant species plays a significant role in maintaining healthy coral reefs by consuming algae. The 1983 mass mortality event dramatically impacted populations, making it particula...

Paracentrotus lividus, commonly known as the rock urchin or purple sea urchin, is a species of echinoderm found in the Mediterranean Sea and the eastern Atlantic Ocean. It primarily inhabits rocky shores and seagrass meadows, where it plays a crucial ecological role by grazing on algae. The species...

Evechinus chloroticus, commonly called kina, is a sea urchin species endemic to the shallow coastal waters of New Zealand, including the Chatham and Subantarctic islands. It belongs to the family Echinometridae and is characterized by short, dense, usually dark-brown or greenish spines. The edible g...

Diadema setosum is a regular sea-urchin belonging to the Diadematidae family. This extant Indo-Pacific species is notable for its vibrant orange anal ring, a characteristic that distinguishes it within the *Diadema* genus. It’s particularly relevant to marine biologists and researchers studying urch...

The red slate pencil urchin is the Indo-Pacific sea urchin Heterocentrotus mammillatus. It is distinguished by large, blunt, club-shaped spines that are often red and provide a markedly different appearance from the thin spines of many other urchins. It inhabits rocky reef environments, where its gr...

The slate pencil urchin is a marine echinoderm found in the shallow waters of the Indo-Pacific region. It is scientifically recognized as Heterocentrotus mammillatus and belongs to the family Echinometridae. The animal is distinguished by its exceptionally thick, blunt, and smooth spines, which are...

Mespilia globulus is a regular sea-urchin belonging to the temnopleuridae family. This extant species, often called the "tuxedo urchin," is notable for its distinctive dark and light rings around its body. It’s commonly kept in aquariums by enthusiasts and researchers studying echinoderm behavior an...

The shingle urchin (Colobocentrotus atratus) is a species of sea urchin found in the Indo-Pacific region, particularly in areas exposed to heavy wave action. It is uniquely adapted to its harsh intertidal environment through its strongly flattened, dome-shaped test and modified, scale-like spines. T...

The flower urchin is the Indo-Pacific species Toxopneustes pileolus. Its short spines and conspicuous pedicellariae can create a flower-like appearance, while those structures contain venom capable of causing intense pain and other serious symptoms in people who touch them. It is therefore an animal...

The green sea urchin (Strongylocentrotus droebachiensis) is a cold-water marine echinoderm native to the coastal environments of the North Atlantic and Pacific Oceans. Characterized by its greenish test and protective spines, the species inhabits rocky subtidal zones where it grazes on algae and kel...

The fire urchin is the Indo-Pacific sea urchin Asthenosoma varium. It has a flexible body and vividly colored spines, often with contrasting bands or patches, which give it the appearance associated with its common name. Its spines and venomous pedicellariae can cause painful injuries, so the specie...

The flower urchin (Toxopneustes pileolus) is a species of sea urchin found in the Indo-Pacific region, particularly on coral reefs. It is covered with distinctive flower-like appendages called pedicellariae, which are actually venomous structures used for defense and capturing food. The flower urchi...

The collector urchin (Tripneustes gratilla) is a species of sea urchin distributed throughout the tropical Indo-Pacific, from the east coast of Africa to Hawaii. It is named for its habit of covering itself with seaweed, shells, pebbles, and other debris, which is believed to provide camouflage and...

Strongylocentrotus droebachiensis, commonly called the green sea urchin, is an extant species of sea urchin belonging to the Strongylocentrotidae family. It inhabits Arctic and subarctic waters. This urchin is notable for its resilience in cold environments and its edible nature. Researchers utilize...

The blue tuxedo urchin is the Indo-Pacific sea urchin Mespilia globulus. It is a relatively small species with a rounded body and contrasting blue and tan coloration, often arranged in bands or patterned areas. Because it grazes algae from hard surfaces, it is kept in some marine aquariums by people...

Echinothrix calamaris, or banded hatpin urchin, is a regular sea-urchin belonging to the Diadematidae family. This extant species inhabits the Indo-Pacific region and is notable for its striking pattern of alternating dark and light spines. It’s primarily studied by marine biologists researching ech...

*Tripneustes gratilla*, or the collector urchin, is a regular sea-urchin belonging to the Toxopneustidae family. It’s notable for its unique behavior of collecting and hoarding foreign objects – shells, pebbles, and even small fish – around its body. Found exclusively in the Indo-Pacific region, thi...

Diadema savignyi is a regular sea urchin belonging to the Diadematidae family and found throughout the Indo-Pacific region. This long-spined species is notable for its distinctive appearance and role in maintaining reef ecosystems. It’s frequently studied by marine biologists and researchers investi...

Mesocentrotus nudus is a regular sea-urchin belonging to the Strongylocentrotidae family. It inhabits kelp forests of the North Pacific, specifically around Japan. This species is notable for its prevalence and role in the ecosystem. Scientists study it to understand urchin populations and their imp...

The green sea urchin is Strongylocentrotus droebachiensis, a cold-water species found across northern parts of the Atlantic and Pacific Oceans. It is harvested in places including Maine and Japan for its edible gonads, which are commonly sold as uni. The species is relevant both to commercial fisher...

Loxechinus albus, commonly known as the Chilean sea urchin, is a species of marine echinoderm native to the coasts of South America. Described by the naturalist Juan Ignacio Molina in 1782, it is the only recognized species within its genus and inhabits shallow, rocky subtidal zones from Peru to Arg...