413:
407:
401:
768:
20:
67:– can be squirted; its proximity to the base of the funnel means that the ink can be distributed by ejected water as the cephalopod uses its jet propulsion. The ejected cloud of melanin is bound by
71:
particles, so it forms a lump approximately the size and shape of the cephalopod, fixing the predator's attention while the mollusc itself makes a hasty escape.
648:
269:
653:
52:, all Coleoidea (squid, octopus and cuttlefish) which dwell in light conditions have an ink sac, which can be used to expel a cloud of dark
171:
809:
456:
129:
112:
164:
412:
406:
400:
802:
441:
828:
157:
461:
451:
833:
643:
638:
795:
59:
The ink sac is a muscular bag which originated as an extension of the hind gut; it is a modified
63:. It lies beneath the gut and opens into the anus, into which its contents – almost pure
745:
259:
733:
8:
717:
482:
372:
357:
336:
321:
189:
60:
25:
296:
352:
127:
Nair, J.R., D. Pillai, S.M. Joseph, P. Gomathi, P.V. Senan & P.M. Sherief (2011).
586:
521:
108:
741:
712:
622:
511:
501:
426:
421:
331:
306:
100:
783:
607:
579:
569:
564:
552:
537:
477:
382:
326:
244:
94:
779:
674:
496:
487:
446:
311:
301:
53:
45:
104:
822:
699:
249:
658:
557:
316:
216:
612:
367:
775:
749:
704:
516:
506:
254:
211:
180:
49:
38:
19:
737:
679:
377:
226:
221:
149:
602:
574:
767:
264:
64:
41:
617:
362:
68:
48:. With the exception of nocturnal and very deep water
16:Organ in cephalopods used to squirt ink in defense
820:
37:is an anatomical feature that is found in many
130:"Cephalopod research and bioactive substances"
803:
165:
92:
810:
796:
172:
158:
96:Cephalopods : ecology and fisheries
18:
88:
86:
84:
821:
179:
153:
138:Indian Journal of Geo-Marine Sciences
93:Boyle, Peter; Rodhouse, Paul (2004).
762:
452:Flotation devices ("secondary fins")
81:
29:showing the position of the ink sac
13:
744:) → Juvenile → Subadult → Adult •
14:
845:
766:
488:Hepatopancreas (digestive gland)
411:
405:
399:
457:Funnel–mantle locking apparatus
56:in order to confuse predators.
23:Ventral view of the viscera of
644:Nuchal folds (occipital folds)
639:Nuchal crest (occipital crest)
121:
44:used to produce the defensive
1:
74:
782:. You can help Knowledge by
750:Protoconch (embryonic shell)
7:
10:
850:
761:
728:
692:
667:
631:
595:
545:
534:
470:
434:
420:
397:
345:
289:
282:
237:
204:
197:
188:
105:10.1002/9780470995310.ch2
99:. Ames, Iowa: Blackwell.
778:-related article is a
30:
731:Developmental stages:
623:Spadix and antispadix
507:Nephridia ("kidneys")
22:
718:Squid giant synapse
61:hypobranchial gland
26:Chtenopteryx sicula
829:Cephalopod zootomy
649:Occipital membrane
522:Pericardial glands
217:Argonautid eggcase
31:
791:
790:
756:
755:
688:
687:
587:Suckers and hooks
530:
529:
512:Nidamental glands
442:Dermal structures
395:
394:
391:
390:
278:
277:
841:
834:Cephalopod stubs
812:
805:
798:
770:
763:
742:Doratopsis stage
713:Squid giant axon
632:Occipital region
543:
542:
483:Ctenidia (gills)
478:Branchial hearts
471:Internal anatomy
435:External anatomy
432:
431:
415:
409:
403:
287:
286:
202:
201:
195:
194:
174:
167:
160:
151:
150:
144:
136:
134:
125:
119:
118:
90:
849:
848:
844:
843:
842:
840:
839:
838:
819:
818:
817:
816:
759:
757:
752:
724:
709:Nervous system
684:
663:
654:Olfactory organ
627:
591:
536:
526:
466:
425:
416:
410:
404:
387:
341:
274:
245:Belemnoid guard
233:
222:Nautiloid shell
184:
178:
148:
147:
132:
128:
126:
122:
115:
91:
82:
77:
17:
12:
11:
5:
847:
837:
836:
831:
815:
814:
807:
800:
792:
789:
788:
771:
754:
753:
729:
726:
725:
723:
722:
721:
720:
715:
707:
702:
700:Chromatophores
696:
694:
690:
689:
686:
685:
683:
682:
677:
671:
669:
665:
664:
662:
661:
656:
651:
646:
641:
635:
633:
629:
628:
626:
625:
620:
615:
610:
605:
599:
597:
593:
592:
590:
589:
584:
583:
582:
577:
572:
562:
561:
560:
549:
547:
546:Brachial crown
540:
532:
531:
528:
527:
525:
524:
519:
514:
509:
504:
499:
490:
485:
480:
474:
472:
468:
467:
465:
464:
459:
454:
449:
444:
438:
436:
429:
418:
417:
398:
396:
393:
392:
389:
388:
386:
385:
380:
375:
370:
365:
360:
355:
349:
347:
343:
342:
340:
339:
334:
329:
324:
319:
314:
309:
304:
299:
293:
291:
284:
280:
279:
276:
275:
273:
272:
267:
262:
257:
252:
247:
241:
239:
235:
234:
232:
231:
230:
229:
219:
214:
212:Ammonoid shell
208:
206:
199:
192:
186:
185:
177:
176:
169:
162:
154:
146:
145:
120:
113:
79:
78:
76:
73:
46:cephalopod ink
15:
9:
6:
4:
3:
2:
846:
835:
832:
830:
827:
826:
824:
813:
808:
806:
801:
799:
794:
793:
787:
785:
781:
777:
772:
769:
765:
764:
760:
751:
747:
743:
739:
735:
732:
727:
719:
716:
714:
711:
710:
708:
706:
703:
701:
698:
697:
695:
691:
681:
678:
676:
673:
672:
670:
666:
660:
657:
655:
652:
650:
647:
645:
642:
640:
637:
636:
634:
630:
624:
621:
619:
616:
614:
611:
609:
606:
604:
601:
600:
598:
596:Buccal region
594:
588:
585:
581:
578:
576:
573:
571:
568:
567:
566:
563:
559:
556:
555:
554:
551:
550:
548:
544:
541:
539:
533:
523:
520:
518:
515:
513:
510:
508:
505:
503:
502:Needham's sac
500:
498:
494:
491:
489:
486:
484:
481:
479:
476:
475:
473:
469:
463:
460:
458:
455:
453:
450:
448:
445:
443:
440:
439:
437:
433:
430:
428:
423:
419:
414:
408:
402:
384:
381:
379:
376:
374:
371:
369:
366:
364:
361:
359:
356:
354:
351:
350:
348:
344:
338:
335:
333:
330:
328:
325:
323:
320:
318:
315:
313:
310:
308:
305:
303:
300:
298:
295:
294:
292:
288:
285:
281:
271:
268:
266:
265:Spirula shell
263:
261:
260:Gladius (pen)
258:
256:
253:
251:
250:Cirrate shell
248:
246:
243:
242:
240:
236:
228:
225:
224:
223:
220:
218:
215:
213:
210:
209:
207:
203:
200:
196:
193:
191:
187:
182:
175:
170:
168:
163:
161:
156:
155:
152:
142:
139:
131:
124:
116:
114:0-632-06048-4
110:
106:
102:
98:
97:
89:
87:
85:
80:
72:
70:
66:
62:
57:
55:
51:
47:
43:
40:
36:
28:
27:
21:
784:expanding it
773:
758:
730:
659:Nuchal organ
558:Hectocotylus
492:
447:Fins (wings)
353:Body chamber
317:Periostracum
140:
137:
123:
95:
58:
34:
32:
24:
746:Egg fossils
705:Photophores
668:Other parts
613:Odontophore
535:Head &
368:Phragmocone
143:(1): 13–27.
50:cephalopods
823:Categories
776:cephalopod
680:Statocysts
517:Osphradium
255:Cuttlebone
181:Cephalopod
75:References
39:cephalopod
738:Paralarva
565:Tentacles
378:Siphuncle
337:Umbilicus
322:Sculpture
227:Orthocone
603:Aptychus
575:Dactylus
346:Internal
297:Aperture
290:External
283:Features
238:Internal
205:External
42:mollusks
693:General
493:Ink sac
358:Camerae
332:Sutures
183:anatomy
65:melanin
35:ink sac
618:Radula
570:Carpus
427:funnel
424:&
422:Mantle
383:Whorls
307:Callus
270:Stylet
111:
774:This
734:Spawn
580:Manus
538:limbs
373:Septa
363:Nacre
327:Spire
312:Lirae
198:Types
190:Shell
133:(PDF)
69:mucus
780:stub
675:Eyes
608:Beak
553:Arms
495:and
462:Tail
302:Apex
109:ISBN
497:ink
101:doi
54:ink
33:An
825::
748:•
736:→
141:40
107:.
83:^
811:e
804:t
797:v
786:.
740:(
173:e
166:t
159:v
135:.
117:.
103::
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
