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αχινός - translation to English
αχινός
sea urchin
sea urchin
 and Echinometra viridis (Reef Urchin - bottom).jpg?width=200)
![The thick spines (radiola) of [[Cidaridae]] were used for walking on the soft seabed.](https://commons.wikimedia.org/wiki/Special:FilePath/Cidaridae - radiola (cropped).JPG?width=200 "The thick spines (radiola) of [[Cidaridae]] were used for walking on the soft seabed.")
 3.jpg?width=200 "45 px")
.jpg?width=200 "80 px")
.JPG?width=200 "50 px")
![''[[Diadema setosum]]''](https://commons.wikimedia.org/wiki/Special:FilePath/Diadema setosum (Kenya).JPG?width=200 "''[[Diadema setosum]]''")
![''Pluteus'' larva has [[bilateral symmetry]].](https://commons.wikimedia.org/wiki/Special:FilePath/Echinocardium cordatum (Pennant, 1777) early pluteus width ca.JPEG?width=200 "''Pluteus'' larva has [[bilateral symmetry]].")
![Digestive and circulatory systems of a regular sea urchin:<br/>a = [[anus]] ; m = [[madreporite]] ; s = aquifer canal ; r = radial canal ; p = podial ampulla ; k = test wall ; i = [[intestine]] ; b = mouth](https://commons.wikimedia.org/wiki/Special:FilePath/Echinoidea anatomie.svg?width=200 "Digestive and circulatory systems of a regular sea urchin:<br/>a = [[anus]] ; m = [[madreporite]] ; s = aquifer canal ; r = radial canal ; p = podial ampulla ; k = test wall ; i = [[intestine]] ; b = mouth")
![The [[flower urchin]] is a dangerous, potentially lethally venomous species.](https://commons.wikimedia.org/wiki/Special:FilePath/Flower urchin by Vincent C Chen.jpg?width=200 "The [[flower urchin]] is a dangerous, potentially lethally venomous species.")
.jpg?width=200 "access-date=14 March 2018}}</ref>")
.jpg?width=200 "80 px")
![purple sea urchin]]](https://commons.wikimedia.org/wiki/Special:FilePath/Seeigel-Saugfuesse(Galicien2005).jpg?width=200 "purple sea urchin]]")
.jpg?width=200 "60 px")
![Sea urchin anatomy based on ''[[Arbacia]]'' sp.](https://commons.wikimedia.org/wiki/Special:FilePath/Urchin9b.jpg?width=200 "Sea urchin anatomy based on ''[[Arbacia]]'' sp.")
![''[[Paracentrotus lividus]]'', a regular sea urchin ([[Euechinoidea]], infraclass [[Carinacea]])](https://commons.wikimedia.org/wiki/Special:FilePath/Paracentrotus lividus profil.JPG?width=200 "''[[Paracentrotus lividus]]'', a regular sea urchin ([[Euechinoidea]], infraclass [[Carinacea]])")
![A [[sand dollar]], an irregular sea urchin ([[Irregularia]])](https://commons.wikimedia.org/wiki/Special:FilePath/Live Sand Dollar trying to bury itself in beach sand.jpg?width=200 "A [[sand dollar]], an irregular sea urchin ([[Irregularia]])")
![''[[Phyllacanthus imperialis]]'', a cidaroid sea urchin ([[Cidaroidea]])](https://commons.wikimedia.org/wiki/Special:FilePath/Phyllacanthus.jpg?width=200 "''[[Phyllacanthus imperialis]]'', a cidaroid sea urchin ([[Cidaroidea]])")
![Test of an ''[[Echinus esculentus]]'', a regular sea urchin](https://commons.wikimedia.org/wiki/Special:FilePath/Sea Urchin test 5629 03 22.jpg?width=200 "Test of an ''[[Echinus esculentus]]'', a regular sea urchin")
![sand dollar]]")](https://commons.wikimedia.org/wiki/Special:FilePath/Echinodiscus2.jpg?width=200 "sand dollar]]\")")
![cidaroid]] sea urchin. These are characterised by their big tubercles, bearing large radiola.](https://commons.wikimedia.org/wiki/Special:FilePath/Phyllacanthus imperialis test.JPG?width=200 "cidaroid]] sea urchin. These are characterised by their big tubercles, bearing large radiola.")
.jpg?width=200 "Close-up of the test showing an ambulacral groove with its two rows of pore-pairs, between two interambulacra areas (green). The tubercles are non-perforated.")
![Wolf eel]], a highly specialized predator of sea urchins](https://commons.wikimedia.org/wiki/Special:FilePath/Wolf eel eating a sea urchin.jpg?width=200 "Wolf eel]], a highly specialized predator of sea urchins")
![purple sea urchin]].](https://commons.wikimedia.org/wiki/Special:FilePath/Sea otter with sea urchin.jpg?width=200 "purple sea urchin]].")
![A marbled stone crab (''[[Carpilius convexus]]'') attacking a slate pencil sea urchin (''[[Heterocentrotus mamillatus]]'')](https://commons.wikimedia.org/wiki/Special:FilePath/Carpilius convexus is consuming Heterocentrotus trigonarius in Hawaii.jpg?width=200 "A marbled stone crab (''[[Carpilius convexus]]'') attacking a slate pencil sea urchin (''[[Heterocentrotus mamillatus]]'')")
![wrasse]] finishing the remains of a damaged ''[[Tripneustes gratilla]]''](https://commons.wikimedia.org/wiki/Special:FilePath/Saddle Wrasse are feeding on sea urchin in Kona.jpg?width=200 "wrasse]] finishing the remains of a damaged ''[[Tripneustes gratilla]]''")
![Purple sea urchins]] at low tide in [[California]]. They dig a cavity in the rock to hide from predators during the day.](https://commons.wikimedia.org/wiki/Special:FilePath/Sea urchins in california tide pools.jpg?width=200 "Purple sea urchins]] at low tide in [[California]]. They dig a cavity in the rock to hide from predators during the day.")
![''[[Dermechinus horridus]]'', an abyssal species, at thousands of meters deep](https://commons.wikimedia.org/wiki/Special:FilePath/Expl1825 - Flickr - NOAA Photo Library.jpg?width=200 "''[[Dermechinus horridus]]'', an abyssal species, at thousands of meters deep")
![Antarctic sea urchin (''[[Sterechinus neumayeri]]'') inhabits frozen seas.](https://commons.wikimedia.org/wiki/Special:FilePath/Underwater mcmurdo sound.jpg?width=200 "Antarctic sea urchin (''[[Sterechinus neumayeri]]'') inhabits frozen seas.")
![shingle urchin]] allows it to stay on wave-beaten cliffs.](https://commons.wikimedia.org/wiki/Special:FilePath/Colobocentrotus atratus Shingle urchin.jpg?width=200 "shingle urchin]] allows it to stay on wave-beaten cliffs.")
![''[[Archaeocidaris]] brownwoodensis'', [[Cidaroida]], [[Carboniferous]], c. 300 mya](https://commons.wikimedia.org/wiki/Special:FilePath/Archaeocidaris brownwoodensis MHNT.jpg?width=200 "''[[Archaeocidaris]] brownwoodensis'', [[Cidaroida]], [[Carboniferous]], c. 300 mya")
![''[[Miocidaris]] coaeva'', [[Cidaroida]], Middle [[Triassic]], c. 240 mya](https://commons.wikimedia.org/wiki/Special:FilePath/Miocidaris coaeva MHNT.PAL.2006.94.jpg?width=200 "''[[Miocidaris]] coaeva'', [[Cidaroida]], Middle [[Triassic]], c. 240 mya")
![Clypeus]] plotti'', [[Irregularia]], Middle [[Jurassic]], c. 162 mya](https://commons.wikimedia.org/wiki/Special:FilePath/Clypeus plotti, echinoid, Middle Jurassic, Gloucester, Gloucestershire, England - Houston Museum of Natural Science - DSC01800.JPG?width=200 "Clypeus]] plotti'', [[Irregularia]], Middle [[Jurassic]], c. 162 mya")
![''[[Echinocorys]]'', [[Holasteroida]], Upper [[Cretaceous]], c. 80 mya](https://commons.wikimedia.org/wiki/Special:FilePath/Fossil Echinoid Echinocorys.jpg?width=200 "''[[Echinocorys]]'', [[Holasteroida]], Upper [[Cretaceous]], c. 80 mya")
![''[[Echinolampas]] ovalis'', [[Cassiduloida]], Middle [[Eocene]], c. 40 mya](https://commons.wikimedia.org/wiki/Special:FilePath/Echinolampas ovalis M Eocene Civrac-en-Médoc France.JPG?width=200 "''[[Echinolampas]] ovalis'', [[Cassiduloida]], Middle [[Eocene]], c. 40 mya")
![''[[Clypeaster]] portentosus'', [[Clypeasteroida]], [[Miocene]], c. 10 mya](https://commons.wikimedia.org/wiki/Special:FilePath/Clypeaster portentosus.jpg?width=200 "''[[Clypeaster]] portentosus'', [[Clypeasteroida]], [[Miocene]], c. 10 mya")
![Sea urchin (''uni'') as ''[[sashimi]]'' with a dab of ''[[wasabi]]''](https://commons.wikimedia.org/wiki/Special:FilePath/Uniryori.jpg?width=200 "Sea urchin (''uni'') as ''[[sashimi]]'' with a dab of ''[[wasabi]]''")
![Japanese ''uni-ikura don'', sea urchin egg and salmon egg ''[[donburi]]''](https://commons.wikimedia.org/wiki/Special:FilePath/Uni-ikura-don7030188ウニイクラ丼.jpg?width=200 "Japanese ''uni-ikura don'', sea urchin egg and salmon egg ''[[donburi]]''")
CLASS OF MARINE INVERTEBRATES
Sea Urchin; Sea urchins; Echinoidea; Sea-Urchin; Taxonomy of Echinoidea; Echinoid; Sea hedgehog; Aristotle's lantern; Seaurchin; Sea eggs; Sea egg; Uni sushi; Whore's egg; Whore's eggs; Echinoids; Sea urchin anatomy; Uni (food); Sea-urchin; Evolution of sea urchins; Sea urchin as food; Apical disc; Apical system
αχινός, είδος αχινόδερμου
Wikipedia
Αχινός
Οι αχινοί, ή αχινιοί, (καθαρεύουσα εχίνοι), είναι μικρά, θαλάσσια ζώα με ασβεστολιθικό σφαιρικό κέλυφος που φέρουν αγκάθια. Ανήκουν στην υπο-συνομοταξία των Εχινοζώων (ή Ελευθεροζώων), της συνομοταξίας των Εχινοδέρμων, στην οποία ανήκουν και οι αστερίες.
