07 August 2010

Why does the Sand bubbler crab form tiny sand balls?

Even though I go to the beach quite often, until recently I have never realized that on some of Krabi's beaches are tiny cute crabs that seem to work really hard. What I discovered during low tide were mysterious patterns, created from sand balls, that made me wonder why they have been formed over and over again.

After swimming in the ocean at Klong Muang beach, Krabi, I went back home, still wondering about these sand patterns. Hence, I started searching for details about this phenomenon on the internet and found a quite interesting explanation indeed .

These tiny animals are called Sand bubbler crabs (Pu Lom in Thai). Beside the fact that they can run very fast, they also form these tiny sand balls around their hole. The ball's size is as big as their body. Each ball takes about 10 seconds or even less to form. What in fact interested me most is an answer to the question: "Why do they do this?"

The answer is simple. It is all about food.
High tide brings organic substances onto the beach. At low tide, these crabs will come out of their holes, looking for food.
They use their claws to take the sand through their mouth and after having eaten all organic materials from it, they will release the sand again. During this process, however, they will shape the sand into tiny balls. These crabs will form about 360 balls per hour, and these balls are not just being scattered around. Amazing patterns are being created that soon, after 3 or 4 hours, cover most of the beach.

So, why do they form these patterns? In this way they make sure that they don't come back and eat the sand again that has already been stripped of organic material. Smart, isn't it?

Let's take a look their work!

@GeoVenture, @Tripbod


  1. thanks dude for making me awre about this fact....

  2. was just in hua hin and saw this...do you think there are genetic variations in the crabs that show up in the patterns...why are some so geometric and some just random???

    1. Thanks David! good & interesting question.
      I have to find out more accurate answer.
      If anybody knows about this base on scientific facts. pls. let us know.

  3. I had been only searching for this info for some time. After Six hours regarding constant Googleing, at last I managed to get the item in the website.
    I ponder what’s the Google’s dilemma which doesn’t status such a beneficial web pages closer to the most notable.
    Normally the top rated web sites tend to be rich in waste.
    Specifically not too long ago, following the fresh panda protocol
    Also see my web site > Treatments For Genital Warts

  4. Good day! Do you know if they make any plugins to
    safeguard against hackers? I'm kinda paranoid about losing everything I've worked hard on.
    Any tips?
    Stop by my web-site : backup camera

  5. I loved as much as you'll receive carried out right here. The sketch is attractive, your authored subject matter stylish. nonetheless, you command get bought an nervousness over that you wish be delivering the following. unwell unquestionably come more formerly again since exactly the same nearly very often inside case you shield this hike.
    my webpage - Promo Codes

  6. Hi, not long listed using a mailing list in a few internet marketing weblog
    and from now on I personally maintain having numerous email messages within my email which it nearly destroyed that email address contact information.

    As well as the unsubscbribe url fails often. Can you to be a tumblr suggest me what to do, since I would
    personally appreciate and keep this email.
    Visit my website ; Check background

  7. This blog was... how do I say it? Relevant!! Finally I've found something that helped me. Thank you!
    Here is my web-site :: What is an EMT?

  8. Aw, this was a really good post. Finding the
    time and actual effort to produce a really good article…
    but what can I say… I procrastinate a whole lot and don't seem to get nearly anything done.
    Also visit my web-site - Lexington Law

  9. Malaysia & Singapore & brunei ultimate on the internet blogshop for wholesale & supply korean add-ons,
    earrings, earstuds, pendant, rings, hair, bracelet & bracelet add-ons.

    Deal 35 % wholesale rebate. Ship Worldwide
    Visit my blog - locksmith salt lake city

  10. Malaysia & Singapore & brunei ultimate on the internet blogshop for wholesale & supply korean add-ons, earrings,
    earstuds, pendant, rings, hair, bracelet & bracelet add-ons.
    Deal 35 % wholesale rebate. Ship Worldwide
    My site > locksmith salt lake city

  11. Greetings! Very helpful advice in this particular article!
    It is the little changes that produce the most important
    changes. Thanks for sharing!
    My webpage > The Tao of Badass Review

  12. Quality posts is the secret to be a focus for the visitors to pay a visit the site, that's what this site is providing.
    Here is my web blog ... web hosting delhi

  13. Hey! I understand this is kind of off-topic
    but I had to ask. Does operating a well-established website like yours require a
    lot of work? I'm brand new to running a blog but I do write in my diary daily. I'd like to start a blog so I can easily
    share my own experience and thoughts online. Please let me know if you have any kind of ideas
    or tips for brand new aspiring bloggers.
    Appreciate it!

    Also visit my web-site; wii u rumors
    my site > wii u blog

  14. Me and my team was in search of a rarely found platform which can help us for our new assignment. We are writers and its been a long time we are in this writing field. So we would appreciate help of this blog.healer amsterdam