| 1. | The ink sac is pear-shaped, with a silvery blue-green outer layer.
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| 2. | Like many Parker fountain pens, the 180 had a flexible ink sac reservoir.
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| 3. | The squid can also secrete bioluminescent mucous from glands near the ink sac.
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| 4. | Like many deep-sea cephalopods, the vampire squid lacks ink sacs.
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| 5. | It employs the two defensive mechanisms typical of all octopuses : ink sacs and camouflage.
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| 6. | She also discovered that belemnite fossils contained fossilised ink sacs like those of modern cephalopods.
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| 7. | Cirrate octopuses are noteworthy for lacking ink sacs.
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| 8. | In the sandbox game " Minecraft ", squids are passive, non-playable characters that carry obtainable ink sacs.
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| 9. | The ink sac contains a dumbbell-shaped photophore.
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| 10. | The Sheaffer " Snorkel " system filled the ink sac through a retractable tube above and behind the pen point.
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