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  • Jaejeong & Jaeah Kim

Squid Dissection || Pen & Ink

What’s inside a squid? Learn how to dissect a squid in this video, which also covers its external and internal anatomy and physiology. In this simple dissection of a squid, you’ll learn various parts of its anatomy, how many arms squids have, and why squids have a beak.

Squids are a very interesting animal because they represent some of the extremes of the invertebrates - the fastest, and one of the smartest. Their anatomy also has some exciting features that you wouldn’t see in your own anatomy. Their hearts in particular are fascinating to learn about! Also, did you know that squids can fly? In this video, you’ll learn general information about squids, which will be tied into its anatomical structures.

This dissection lab is for anyone who is curious about squid anatomy, wants to cover squid anatomy for a zoology course, missed the squid dissection during biology class, or just wondered, “What’s inside a squid?”. The video will teach you how to dissect a squid step by step, and review the external and internal anatomy of the squid.

In this video, we’ll cover the following structures:

Skin Brachial heart

Chromatophores Digestive gland (liver)

Mantle Stomach

Fins Caecum

Siphon Vas deferens

Eye Testes

Lens Nidamental glands (mentioned)

Arms Ovary (mentioned)

Tentacles Ink sac

Suckers Retractor muscles

Mouth Brain

Beak Skull

Peritoneum Buccal mass

Gills Beak

Heart Pen

Systemic heart

If you want to learn more about squid anatomy, here’s a link to a website with more detailed information, as well as diagrams:

If you have any questions regarding squid anatomy, dissection methodology, or general biology, feel free to leave a comment. We'll try our best to reply.


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