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The morning sun star has a wide disc and 8 to 13 (usually 11 or 12) long, tapering arms, often with turned-up tips. The upper or aboral surface is smooth, and its colour is usually red, orange, grey, or pale brown, sometimes with paler patches. It grows to a width of about 40 cm (16 in).
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The morning sun star occurs in the northern
Pacific Ocean at depths to about 420 m (1,380 ft). Its range extends from Japan, China, and Siberia to the coasts of North America as far south as California. It is often found in rocky habitats, but can also inhabit other types of seabed.
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release eggs and sperm which rise to the surface where the eggs are fertilised. They have large yolks and the developing larvae rely on this and do not feed. They can swim and they drift with the currents as part of the
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and coil their arms around the morning sun star, nipping it with these. It recoils and its prey often manages to escape. Another sometimes successful defence strategy is used by the
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334:) which inflates its aboral surface making it difficult for the attacker to get a grip on it and at the same time exudes copious amounts of noxious
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294:, feeding mostly on other starfish. It is feared by other stars which move away as fast as they can if touched by a morning sun star. In
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346:) retreats when touched by a morning sun star. If grabbed, the sunflower star may leave one of its arms behind, a process called
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195:. It is found on either side of the northern Pacific Ocean. It has two subspecies:
322:) fight back at their attacker. They have numerous tiny pincer-like organs called
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570:"Mysterious Mass Sunflower Starfish (Pycnopodia) Die-off in British Columbia"
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The morning sun star breeds between March and June. The
535:Dorit, R. L.; Walker, W. F.; Barnes, R. D. (1991).
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403:"WoRMS - World Register of Marine Species -
374:. They later sink to the seabed and undergo
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543:. Saunders College Publishing. p.
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381:This species has been subject to the
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852:Taxa named by Addison Emery Verrill
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511:Sea stars of the Pacific Northwest
443:Sea stars of the Pacific Northwest
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265:attacking a spiny red sea star,
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568:Mah, Christopher (2013-09-03).
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842:Fauna of the Pacific Ocean
290:The morning sun star is a
847:Animals described in 1880
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200:Solaster dawsoni arcticus
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49:Scientific classification
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39:
30:
23:
505:Pycnopodia helianthoides
383:Sea star wasting disease
378:into juvenile starfish.
344:Pycnopodia helianthoides
338:. Even the often larger
284:Sea star wasting disease
206:Solaster dawsoni dawsoni
360:diamondback nudibranchs
513:. 2011. Archived from
445:. 2011. Archived from
304:Dermasterias imbricata
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320:Orthasterias koehleri
278:An adult specimen of
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332:Pteraster tesselatus
312:Stylasterias forreri
483:Race Rocks Taxonomy
435:"Morning sun star:
409:. Marinespecies.org
268:Hippasteria spinosa
16:Species of starfish
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773:Open Tree of Life
596:Taxon identifiers
503:"Sunflower star:
340:sunflower seastar
282:afflicted by the
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405:Solaster dawsoni
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296:British Columbia
280:Solaster dawsoni
263:Solaster dawsoni
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181:morning sun star
176:Solaster dawsoni
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158:Solaster dawsoni
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41:Solaster dawsoni
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554:0-03-030504-7
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517:on 2012-09-09
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449:on 2012-09-09
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149:Binomial name
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577:. Retrieved
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519:. Retrieved
515:the original
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451:. Retrieved
447:the original
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411:. Retrieved
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385:since 2013.
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316:rainbow star
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245:Distribution
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193:Solasteridae
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116:Solasteridae
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18:
786:SeaLifeBase
734:NatureServe
695:iNaturalist
628:Wikispecies
372:zooplankton
308:velcro star
213:Description
831:Categories
579:2013-11-17
574:Echinoblog
521:2012-09-24
488:2012-09-21
453:2012-09-21
413:2012-02-15
389:References
328:slime star
314:) and the
96:Asteroidea
739:2.1059908
254:Behaviour
134:Species:
106:Valvatida
72:Kingdom:
66:Eukaryota
837:Solaster
713:10199152
619:Q2008443
613:Wikidata
352:cannibal
348:autotomy
292:predator
189:starfish
127:Solaster
112:Family:
82:Phylum:
76:Animalia
62:Domain:
801:4780092
687:2270931
539:Zoology
239:Eating.
185:species
183:, is a
167:, 1880
165:Verrill
122:Genus:
102:Order:
92:Class:
814:292720
798:uBio:
778:258318
765:292720
752:105863
726:157075
700:117692
661:140242
551:
367:gonads
179:, the
809:WoRMS
791:49370
708:IRMNG
674:4Y558
336:mucus
760:OBIS
747:NCBI
721:ITIS
682:GBIF
656:BOLD
549:ISBN
358:and
669:CoL
643:ADW
545:782
187:of
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
