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  • Jaejeong & Jaeah Kim

Starfish (Sea Star) Dissection || Neither Star Nor Fish

Curious about starfish anatomy? Learn how to dissect a starfish in this video, which also covers its external and internal anatomy and physiology. In this simple dissection of a starfish, you’ll learn various parts of the echinoderm anatomy, how starfish eat, and why starfish shouldn’t be called starfish.

Even though sea stars are relatively simple animals, there’s still a lot to learn about their anatomy. They are invertebrates, and the way their bodies function differ greatly from ours, and is fascinating to learn! For example, did you know that sea stars have ten digestive glands in total? In this video, you’ll learn general information about sea stars, which will be tied into its anatomical structures.

This dissection lab is for anyone who is curious about sea star anatomy, wants to cover sea star anatomy for a zoology course, missed the sea star dissection during biology class, or just wants to have a fun time. The video will teach you how to dissect a sea star step by step, and review the external and internal anatomy of the sea star.

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

Radial Arms Internal skeleton

Central Disk Stomach

Eyes Digestive glands (pyloric ceca)

Madreporite Gonads

Spines Stone canal

Mouth Ring canal

Ambulacral groove Radial canal

Tube feet Ampulla

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

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


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