Copepod egg sac

This is a meta learning post of how the foldscope contributes to my learning and growth, which I felt was worth sharing.

From the same Hopkins trip where I found the nudibranch eggs, I also was able to find Copepods swimming in the ocean water sample.

I took two videos exactly and couldn’t make head or tail (literally) of the Copepods. I left the videos on my phone and forgot about them, until right now. I’m sure you have a similar experience where you stick something under the foldscope but don’t ‘learn’ anything per se from the experiment.

Today, I came across this book from the stanford library and I was leafing through it and saw the following images.

Page 148 describes Copepods and the caption says that female Copepods can be distinguished by the presence of egg sacs near the tail. And there is the following image on page 149.

As soon as I saw these images, a bulb went off in my brain. I recalled seeing something similar. With my own eyes !! So I pulled out my phone and was able to find the following two videos which in my mind I has written off as ‘meh, not interesting‘, perhaps because I was just exhausted that day after hours of foldscoping 🙂

So, clearly what I was observing were the beautiful egg sacs on a female copepod.

The lesson here, at least for me, is that sometimes it’s easy to think that just because you see through a foldscope, you’ll learn instantly or not learn something. Sometimes it takes time to make the connections.

So, be patient, and keep exploring.


5 Comments Add yours

  1. Manu Prakash says:

    @saad: what a great comment Saad. The idea of patience is crucial. That’s why bisitin the same subjects over and over again is crucial. That’s why people who live where the organisms are is crucial; because they can back to the same samples again.

    Talk about forgeting about data you collected – the transparent krill I had shared a couple of weeks ago; I totoally forgot about that data. Not because I was not amazed and hypnotized; but because I am forgetful 🙂

    So many good ideas shared in this post.

    Patience is everything.


  2. Matt.Rossi says:

    Ah! I love copepods! They’re so difficult to catch, but so beautiful under the microscope. They’re such elegant creatures and capable of moving at an insanely rapid pace.

  3. laksiyer says:

    @Saad.. please hold on to the copepod if you can and look out for the larva. Their larva will surprise you even more. For the longest time (I dont want to embarrass myself) I thought it was a a acarid mite until I realized that it was a copepd larva.

  4. Saad Bhamla says:

    @laks – i no longer have the copepods.. but i know what to look for next time : )

  5. Manu Prakash says:

    @saad @Laks: I have got some right here – in front of me right now 🙂 will look for the larvae. I am intrigued by what Laks said..


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