273:
do on a roof, and this means the test is flexible. The test is divided into five interambulacral areas separated by five ambulacral grooves. There are two series of spines arranged in five radial bands, each spine articulating with the test in a ball-and-socket joint. The primary spines on the aboral (upper) surface are short, thick and sharply-pointed, grow in rectangular areas and are clumped together in dense bundles. Each spine has several hollow spherical capsules, separated by constrictions, which are filled with
33:
46:
295:. The secondary spines are long, flexible, slender and blunt, and mostly found near the base of the test; they are used in locomotion and righting, and have sensory cells at their tip. The general colour of this sea urchin is orangish, red, brown or purple, or occasionally beige or some shade of green. The primary spines are banded, usually with paler bases and darker tips, and the secondary spines are yellowish.
254:
272:
is formed are not joined rigidly together, as is the case in most sea urchins. Instead, the plates are fused in groups of three, each group consisting of a central primary plate with a half-size plate on each side. The edge of each group of plates overlaps the next group in the same manner as tiles
500:
204:. Its venom tipped spines, with distinctive globular swellings below the tip, can inflict a painful sting if handled; the pain lasts as long as several hours. This capacity, perhaps coupled with its reddish-brown colour, has given it the common name
281:. On the oral (under) surface, the primary spines have a different structure and are trumpet-shaped, the shaft being divided into four zones with different microstructure, in a similar way to the spines of some
306:
is native to the Indo-Pacific region where its range extends from the eastern Indian Ocean to Japan, the
Philippines and New Caledonia. Records of its presence in the
733:
399:
The spines of this sea urchin are venomous, and its bright colouration warns other organisms of this fact. Divers should be wary and avoid handling the urchins.
746:
856:
707:
580:
759:
607:
535:
846:
851:
841:
518:
479:
388:. The sexes are separate in this species. The gametes are released into the water, where fertilisation takes place. The larvae are
808:
268:
is a large sea urchin, hemispherical in shape, and growing to a diameter of 25 cm (10 in). The plates from which the
681:
45:
751:
358:
is one of several small fish that make use of the protection provided by the urchin's toxic spines, as do certain
342:
672:
634:
312:
330:
229:
140:
836:
813:
336:
235:
188:). Growing up to 25 cm (10 in) in diameter, it lives on sand and rubble sea bottoms in the
443:
Modrak, Gaël; Caro, Valérie; Drouet, Isabelle; Weinberg, Steven & Maran, Vincent (10 May 2021).
373:
157:
32:
790:
543:
40:
324:
Several different organisms live in association with the
Pacific fire urchin; these include the
738:
772:
694:
514:
495:
Régis, M.B. & Thomassin, B.A. (1985). "Macro- and microstructure of the primary spines in
475:
800:
777:
506:
354:
686:
499:
Grube (Echinothuridae: Echinoidea): Affinities with the
Diadematidae and Toxopneustidae".
348:
241:
107:
97:
292:
269:
830:
393:
699:
325:
316:. It inhabits coral environments at depths down to about 167 m (550 ft).
282:
253:
189:
785:
720:
666:
287:
117:
657:
369:
359:
177:
173:
87:
77:
510:
197:
185:
57:
444:
651:
389:
385:
381:
712:
392:
and drift for several months before settling on the seabed, undergoing
307:
278:
193:
725:
377:
181:
67:
628:
274:
252:
201:
764:
632:
474:. Philadelphia, PA: Holt-Saunders International. p. 980.
414:
412:
641:
419:Gosliner, T.; D. Behrens & G. Williams (1996).
310:are likely to be from the closely related species,
376:, as well as on encrusting invertebrates such as
567:Reef Creature Identification: Tropical Pacific
8:
372:, feeding on the algal film that covers the
629:
31:
20:
565:Humann, Paul & DeLoach, Ned (2010).
611:2011 Philippine Biodiversity Expedition
534:Guardini, Matteo & Boyer, Massimo.
438:
436:
434:
432:
430:
408:
227:It plays host to the commensal shrimps
608:"There's just some sting about you..."
421:Coral Reef Animals of the Indo-Pacific
7:
396:and becoming juvenile sea urchins.
14:
857:Taxa named by Adolph Eduard Grube
613:. California Academy of Sciences
540:World Database of Marine Species
208:; other commonly used names are
44:
1:
346:, as well as the zebra crab,
261:, showing distinctive spines
873:
847:Fauna of the Pacific Ocean
470:Barnes, Robert D. (1982).
340:, and the parasitic snail
852:Animals described in 1868
842:Fauna of the Indian Ocean
606:Mooi, Rich (6 May 2011).
505:. CRC Press. p. 12.
146:
139:
41:Scientific classification
39:
30:
23:
511:10.1201/9781003079224-59
299:Distribution and habitat
343:Leutzenia asthenosomae
313:Asthenosoma marisrubri
262:
239:, and the zebra crab,
331:Periclimenes colemani
277:; they function like
256:
230:Periclimenes colemani
16:Species of sea urchin
472:Invertebrate Zoology
337:Allopontonia brockii
236:Allopontonia brockii
218:variable fire urchin
546:on 19 November 2011
384:, and also organic
279:hypodermic syringes
222:electric sea urchin
210:Pacific fire urchin
184:that also includes
687:Asthenosoma_varium
673:Asthenosoma varium
643:Asthenosoma varium
583:Asthenosoma varium
497:Asthenosoma varium
451:(in French). DORIS
447:Asthenosoma varium
366:Asthenosoma varium
304:Asthenosoma varium
266:Asthenosoma varium
263:
259:Asthenosoma varium
214:elusive sea urchin
180:, a member of the
169:Asthenosoma varium
150:Asthenosoma varium
25:Asthenosoma varium
824:
823:
773:Open Tree of Life
635:Taxon identifiers
165:
164:
864:
817:
816:
804:
803:
794:
793:
781:
780:
768:
767:
755:
754:
742:
741:
729:
728:
716:
715:
703:
702:
690:
689:
677:
676:
675:
662:
661:
660:
630:
623:
622:
620:
618:
603:
597:
596:
594:
592:
577:
571:
570:
562:
556:
555:
553:
551:
542:. Archived from
531:
525:
524:
492:
486:
485:
467:
461:
460:
458:
456:
440:
425:
424:
416:
355:Siphamia tubifer
152:
49:
48:
35:
21:
872:
871:
867:
866:
865:
863:
862:
861:
827:
826:
825:
820:
812:
807:
799:
797:
789:
784:
776:
771:
763:
758:
750:
745:
737:
732:
724:
719:
711:
706:
698:
693:
685:
680:
671:
670:
665:
656:
655:
650:
637:
627:
626:
616:
614:
605:
604:
600:
590:
588:
579:
578:
574:
564:
563:
559:
549:
547:
533:
532:
528:
521:
494:
493:
489:
482:
469:
468:
464:
454:
452:
442:
441:
428:
418:
417:
410:
405:
349:Zebrida adamsii
322:
301:
251:
242:Zebrida adamsii
161:
154:
148:
135:
108:Echinothuriidae
98:Echinothurioida
43:
17:
12:
11:
5:
870:
868:
860:
859:
854:
849:
844:
839:
829:
828:
822:
821:
819:
818:
805:
795:
782:
769:
756:
743:
730:
717:
704:
691:
678:
663:
647:
645:
639:
638:
633:
625:
624:
598:
572:
569:. p. 448.
557:
526:
519:
487:
480:
462:
449:(Grube, 1868)"
426:
423:. p. 271.
407:
406:
404:
401:
321:
318:
300:
297:
293:Toxopneustidae
250:
247:
163:
162:
155:
144:
143:
137:
136:
132:A. varium
129:
127:
123:
122:
115:
111:
110:
105:
101:
100:
95:
91:
90:
85:
81:
80:
75:
71:
70:
65:
61:
60:
55:
51:
50:
37:
36:
28:
27:
15:
13:
10:
9:
6:
4:
3:
2:
869:
858:
855:
853:
850:
848:
845:
843:
840:
838:
835:
834:
832:
815:
810:
806:
802:
796:
792:
787:
783:
779:
774:
770:
766:
761:
757:
753:
748:
744:
740:
735:
731:
727:
722:
718:
714:
709:
705:
701:
696:
692:
688:
683:
679:
674:
668:
664:
659:
653:
649:
648:
646:
644:
640:
636:
631:
612:
609:
602:
599:
587:. SeaLifeBase
586:
584:
576:
573:
568:
561:
558:
545:
541:
537:
536:"Fire Urchin"
530:
527:
522:
520:9781003079224
516:
512:
508:
504:
503:
502:Echinodermata
498:
491:
488:
483:
481:0-03-056747-5
477:
473:
466:
463:
450:
448:
439:
437:
435:
433:
431:
427:
422:
415:
413:
409:
402:
400:
397:
395:
394:metamorphosis
391:
387:
383:
379:
375:
371:
367:
363:
361:
357:
356:
351:
350:
345:
344:
339:
338:
333:
332:
327:
319:
317:
315:
314:
309:
305:
298:
296:
294:
290:
289:
284:
280:
276:
271:
267:
260:
255:
248:
246:
244:
243:
238:
237:
232:
231:
225:
223:
219:
215:
211:
207:
203:
200:and Southern
199:
195:
191:
187:
183:
179:
175:
171:
170:
159:
153:
151:
145:
142:
141:Binomial name
138:
134:
133:
128:
125:
124:
121:
120:
116:
113:
112:
109:
106:
103:
102:
99:
96:
93:
92:
89:
86:
83:
82:
79:
78:Echinodermata
76:
73:
72:
69:
66:
63:
62:
59:
56:
53:
52:
47:
42:
38:
34:
29:
26:
22:
19:
642:
615:. Retrieved
610:
601:
589:. Retrieved
585:Grube, 1868"
582:
575:
566:
560:
548:. Retrieved
544:the original
539:
529:
501:
496:
490:
471:
465:
453:. Retrieved
446:
420:
398:
365:
364:
353:
347:
341:
335:
329:
323:
311:
303:
302:
286:
285:(especially
283:Diadematidae
265:
264:
258:
257:Close-up of
240:
234:
228:
226:
221:
217:
213:
209:
205:
190:Indo-Pacific
168:
167:
166:
149:
147:
131:
130:
118:
24:
18:
837:Asthenosoma
786:SeaLifeBase
721:iNaturalist
667:Wikispecies
360:cephalopods
288:Echinothrix
249:Description
206:fire urchin
192:, from the
119:Asthenosoma
831:Categories
403:References
390:planktonic
370:omnivorous
178:echinoderm
174:sea urchin
88:Echinoidea
382:tunicates
374:substrate
326:commensal
198:Australia
186:star fish
126:Species:
64:Kingdom:
58:Eukaryota
739:10524448
658:Q2709546
652:Wikidata
550:11 March
386:detritus
328:shrimps
104:Family:
74:Phylum:
68:Animalia
54:Domain:
801:6068844
778:3651095
752:2175310
713:4341377
591:30 June
455:26 June
378:sponges
320:Ecology
308:Red Sea
194:Red Sea
160:, 1868)
114:Genus:
94:Order:
84:Class:
814:214654
798:uBio:
765:214654
726:143228
617:4 July
517:
478:
291:) and
220:, and
182:phylum
809:WoRMS
791:86757
734:IRMNG
700:67W9F
275:toxin
202:Japan
172:is a
158:Grube
760:OBIS
747:NCBI
708:GBIF
619:2021
593:2021
552:2012
515:ISBN
476:ISBN
457:2021
380:and
334:and
270:test
233:and
176:(an
695:CoL
682:AFD
507:doi
368:is
196:to
833::
811::
788::
775::
762::
749::
736::
723::
710::
697::
684::
669::
654::
538:.
513:.
429:^
411:^
362:.
352:.
245:.
224:.
216:,
212:,
621:.
595:.
581:"
554:.
523:.
509::
484:.
459:.
445:"
156:(
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
