Sea Urchin
Project, Fertilisation, Development, Suppliers, Product, Farming, Consultancy, Reports

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Project at a Glance Contents on the CD ROM
  • The sea urchin is a spiny and hard-shelled sea animal which lives on the rocky seafloor, from shallow waters to great depths.
  • These globular marine invertebrates move very slowly along the seabed. There are about 700 different species of sea urchins worldwide.
  • Two common species of sea urchins are the red (Strongylocentrotus franciscanus) and purple
    (S. purpuratus), in shallow waters of California. Both species have been implicated in the decline of kelp beds.
  • In Japan, sea urchins are protected rather than destroyed.
  • Many sea urchins have venomous spines. The biggest sea urchin is the red sea urchin (Strongylocentratus franciscanus); having a test about 7 inches (18 cm) in diameter.
  • Sea urchins eat plant and animal matter, including kelp, decaying matter, algae, dead fish, sponges, mussels, and barnacles.
  • Sea urchins are eaten by snails, sea otters, crabs, sunflower stars, some birds, fish (including wolf eels), and people.
  • Fertilization of sea urchin is external. Female Sea Urchins release several million tiny, jelly-coated eggs at a time.
  • Eggs or sperm are released through five gonophores. As they develop, the tiny larvae (called the pluteus, which have bi-lateral symmetry) swim in the sea and are a component of zooplankton.
  • It takes several months for juvenile sea urchins to form. The time from fertilization to a reproductive adult is from 2 to 5 years.
  • Sea urchins are creatures that live in oceans all over the world. Similar to sea stars, sea urchins have a water vascular system.
  • Their spherical shape is typically small, ranging from about 3 cm to 10 cm in diameter, and their body is covered with a spiny shell.
  •  A common place to find a sea urchin is in coral reefs. Examples of where sea urchins are very commonly found are on the reefs of Hawaii, of the Caribbean and of Australia.
  • Sea urchins have also been reported to cause erosion of reefs in places such as the eastern Pacific, Kenya and the Red sea.
  • So although sea urchins are important to the survival of an ecosystem, they can also become dangerous in great numbers.
  • Other family members include the sea cucumber, sea star and sand dollar.
  • Unfertilized egg, Fertilized egg, Two cell stage, Four cell stage , Eight cell stage, Sixteen cell stage, Thirty two cell stage, Morula stage, Blastula stage, Gastrula stage, Pluteus larval stage are the stages of Fertilization of Sea urchin.
  • Urchins are prized for their edible gonads, known as uni in Japan. High quality uni can be worth as much as $80 or more per pound.
  • The fishery in Maine peaked in 1993 at around 40 million lbs. and employed over 1,800 people; by 2009 less than 5 million lbs. were harvested.
  • 2010 Dock prices for whole urchins exceeded $5/lb. during peak demand.
  • Farming methods include sea ranching, cage systems, and land based tank farms.
  • Urchin gonad bulking, holding for harvest on demand, and value added processing are all ways to optimize a limited resource.
  • The harmful effects of sea urchins to the marine communities called for a reduction in their numbers.


  • Basics of Sea urchin
  • General description
  • Sea urchin
  • Purple Sea urchin
  • Red Sea urchin

Nutritional Facts

  • Nutritional information for Sea urchin
  • Wild fact - Sea urchin
  • Sea Urchins- Some Sea Urchins Have Venomous Spines
  • Sea urchin facts
  • Facts about Sea Urchin
  • Sea urchin nutritional information
  • Nutritional facts of a Sea urchin

Development stages

  • Life cycles - Sea urchin development
  • The Sea Urchin
  • Growth model of the reared sea urchin
  • Sea Urchin Development
  • Sea urchin fertilization and Development
  • Introduction to Sea Urchin Development
  • Growth and age structure of sea urchins
  • Sea Urchin Development
  • The Development of the Sea Urchin


  • Sea urchin fertilization lab
  • Sea urchin - Reproduction
  • Fertilization stages
  • Sea Urchin Fertilization
  • Fertilization of Sea urchin
  • Fertilisation

Videos on Sea urchin Development

  • Sea Urchin egg developing until gastrula
  • Sea Urchin Development
  • Sea Urchin Larval Development
  • The Development of the Sea Urchin
  • Developing Sea Urchins


  • The future of sea urchin culture
  • Farming Sea urchins
  • Norway focuses on sea urchin farming
  • Sea Urchins and Sushi: Farming the Fruits of the Sea
  • How to Farm Sea Urchins
  • Norwegian sea urchin fishing/farming
  • Land-Based Urchin Farming Gives Hope To The Industry
  • Development of artificial feeds to benefit sea urchin farming


  • FRAP analysis of molecular diffusion inside sea-urchin spermatozoa
  • Spindle Microtubule Dynamics in Sea Urchin Embryos:
    Analysis Using a Fluorescein-labeled Tubulin
  • Analysis of Carotenoids in Sea Urchins
  • Proteomic analysis of sea urchin (Strongylocentrotus purpuratus) spicule matrix
  • Perseoartcheomic analysis of sea urchin (Strongylocentrotus purpuratus) spicule matrix.


  • Fisher-Fresh Preserved Specimens
  • Phosbrite
  • MetaGuard
  • Sperm Activating Peptide, Sea Urchin
  • Toxin, sea urchin, Tripneustes gratilla


  • Sea Urchin: One of Sea Product at Tanah Lot
  • Product list
  • From Ocean to Restaraunt
  • Speciality products
  • Sea urchin photo sculpture
  • Sea Urchin - Riccio by Terzani
  • Monday Moodboard - Sea Urchin
  • Preserved Starfish & Sea Urchins


  • Sea urchin project
  • Sea Urchin Project, Lanzarote
  • About Sea urchin
  • A sea urchin genome project: Sequence scan, virtual
    map, and additional resources
  • Sea Urchin and Marine Plants
    Resource Identification-Bay of Islands
  • The San Diego Sea urchin project
  • Relationships among Egg Size, Composition, and Energy: A Comparative Study of Geminate Sea Urchins

Turnkey service providers

  • Small Hydro Power Integrated and customized turnkey solutions
  • Turnkey service providers from Ireland
  • Suppliers of Sea urchin
  • Manufacturers of Sea urchin
  • Selling leads of Sea urchin
  • Exporters of Sea urchin
  • Supplier from California
  • Supplier from U.S.A
  • Online suppliers


  • Consultancy from Azores
  • Consultancy from Ireland
  • Consultancy from New Zealand
  • Consultancy from Missouri
  • Consultancy from Washington
  • Consultancy from U.S.A
  • Online Consultancy
  • Another online Consultancy
  • Reducing overgrazing by Sea urchin by market development
  • Green Sea Urchin
  • Sea Urchin Aquaculture
    in the Gulf of Maine
  • Uni and Selected Shellfish
    Products in Japan and Hong Kong
  • The Japanese Sea urchin market
  • Pacific region Integrated fisheries management plan
  • The Sea Urchin Fishery:
    Harvesting, Processing and the Market
  • A New Fishery Develops
    In California
  • The next big splash in Irish aquaculture
  • Sea Urchin Fishery and Overfishing
  • UCC scientists exploit sea urchin market


  • Urn having a sea urchin shape
  • Device for sea urchins picking
  • Processes for inhibiting the growth of sea urchin eggs
  • Process for maintaining the freshness of raw sea urchin gonads
  • Calcium containing composition from sea urchin with high oral bioavailability
  • Urchin deco pencil sea urchin spine mounted choker charm
  • Process for the preservation of sea urchin gonads by quick freezing


  • Sea urchin recipes
  • Sea Urchin food recipes
  • Sea Urchin Recipe of the Week
  • Sea urchin bruschetta
  • Spicy Spaghettini With Sea Urchin and Tomatoes
  • Sea urchin Linguine
  • Cleaning and Serving Sea Urchins


  • Earth's acid test
  • Sea urchin injuries to the hand
  • Population regulation of the purple Sea urchin at the California channel islands
  • Testing Two Large-Mesh Sea Urchin Diver Catch Bags
  • Sustainable Sea urchins in Chile
  • Relative Abundance and Size Composition of Red Sea Urchin
  • Growth model of the reared sea urchin
  • Sea urchin Granuloma


  • Australian museum scientific publications
  • The role of secondary mesenchyme cells during sea urchin gastrulation
    studied by laser ablation
  • Spikes of the Sea urchin
  • Benchmarked Competitiveness Study of BCs Sea Urchin Fisheries
  • Purple Sea urchins in and out of pits
  • Development biology through a model organism: Sea urchin
  • The South African sea urchin:
    a candidate species for

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