Shopping Cart
Your Cart is Empty
Quantity:
Subtotal
Taxes
Shipping
Total
There was an error with PayPalClick here to try again
CelebrateThank you for your business!You should be receiving an order confirmation from Paypal shortly.Exit Shopping Cart

UB Diving. Voted #1 dive shop by a bunch of divers.

Phone: (250) 338-0161

Email: [email protected]

Dive (b)Log

FFF-July 31st

Posted on July 31, 2015 at 1:00 PM

For this week's Friday Fish fact, I have a whole treasure trove of facts for you about starfish.

Starfish (more correctly known as Sea Stars) are not fish. They are Echinoderms. They are related to sea urchins, sea cucumbers and even sand dollars. All Echinoderms have 5 point radial symmetry, which means that their body has 5 sections (or multiples thereof) arranged around a central disk. Next time you're on a beach or diving, see if you can find a sea star, sand dollar and sea urchin and find the 5 sections in each. 

Not all sea stars have 5 arms. While the five-armed varieties of sea star are the most well-known, not all sea stars have 5 arms. Some have many more. Take our local waters Sun Star for instance, which has up to 40 arms! (Picture below)

Amazingly, sea stars can regenerate lost arms. This is useful if the sea star is threatened by a predator - it can drop an arm, get away and grow a new arm. Sea stars house most of their vital organs in their arms, so some can even regenerate an entirely new sea star from just one arm and a portion of the star's central disc. It won't happen too quickly, though. It takes about a year for an arm to grow back.

Sea stars do not have blood. Instead of blood, sea stars have a water vascular system, in which the sea star pumps sea water through its sieve plate, or madreporite, into its tube feet to extend them. Muscles within the tube feet retract them.

Sea stars have eyes. While they can't see as well as we do, sea stars have an eye spot at the end of each arm. This is a very simple eye that looks like a red spot. The eye doesn't see much detail, but can sense light and dark.

Our sea stars are disappearing. I recall diving as little as 5 years ago and encountering dozens of large sea stars on every dive I went on. 

Lately, I am very hard pressed to recall a dive I've done where I've even seen one. It appears that there is a virus that is circulating between the sea star population that is causing them to die rapidly. You can learn more about what is happening at this link.  Virus killing Sea Stars!




Categories: Funday Fish Fact, marine life

Post a Comment

Oops!

Oops, you forgot something.

Oops!

The words you entered did not match the given text. Please try again.

3160 Comments

Reply goyard handbags
1:57 AM on May 17, 2022 
I must express some appreciation to this writer just for bailing me out of such a difficulty. After exploring throughout the search engines and obtaining principles which are not beneficial, I figured my entire life was over. Living without the solutions to the difficulties you've solved through your main guide is a serious case, and ones that could have in a negative way damaged my entire career if I hadn't discovered the website. Your actual knowledge and kindness in taking care of almost everything was vital. I don't know what I would have done if I hadn't come across such a solution like this. It's possible to now look ahead to my future. Thanks a lot so much for the impressive and sensible help. I won't be reluctant to recommend your web sites to any person who needs and wants counselling on this problem.
goyard handbags http://www.goyardshandbag.com
Reply lebron 16
2:09 AM on May 16, 2022 
Thanks so much for giving everyone an extremely brilliant opportunity to read articles and blog posts from here. It is often so pleasurable and also packed with fun for me and my office acquaintances to visit your web site particularly three times in a week to find out the new stuff you have got. And of course, I am certainly fascinated concerning the fabulous knowledge you serve. Selected 3 tips in this article are in truth the finest we have ever had.
lebron 16 http://www.lebron16.us
Reply yeezy 700
2:08 AM on May 16, 2022 
I truly wanted to jot down a small comment to appreciate you for those awesome techniques you are giving out at this website. My time-consuming internet investigation has at the end been compensated with useful points to write about with my classmates and friends. I 'd express that many of us visitors are unquestionably endowed to be in a wonderful network with so many lovely individuals with useful principles. I feel pretty blessed to have discovered the web page and look forward to really more amazing moments reading here. Thanks again for a lot of things.
yeezy 700 http://www.yeezy-700.com
Reply goyard bags
2:08 AM on May 16, 2022 
I as well as my guys happened to be checking out the excellent things found on the blog while instantly I got a horrible suspicion I never expressed respect to the website owner for those techniques. My young men appeared to be for this reason very interested to learn them and now have unquestionably been making the most of those things. I appreciate you for getting indeed thoughtful and then for obtaining variety of ideal topics millions of individuals are really eager to learn about. Our own sincere regret for not saying thanks to you earlier.
goyard bags http://www.goyardshandbag.us
Reply off white outlet
2:08 AM on May 16, 2022 
I simply wanted to develop a quick message in order to thank you for these pleasant ideas you are placing on this website. My prolonged internet research has now been paid with good ideas to share with my family and friends. I would say that most of us visitors actually are very fortunate to live in a very good website with so many outstanding professionals with useful concepts. I feel somewhat lucky to have seen your entire web page and look forward to many more fabulous minutes reading here. Thanks again for a lot of things.
off white outlet http://www.offwhites.us.com
Reply golden goose sneakers
2:08 AM on May 16, 2022 
My spouse and i felt now peaceful that Albert could do his survey by way of the ideas he acquired when using the site. It's not at all simplistic just to happen to be giving for free concepts which usually other people might have been selling. Therefore we remember we need the blog owner to thank for that. The type of illustrations you have made, the simple site menu, the relationships you make it easier to foster - it is most fantastic, and it's really helping our son in addition to us reason why that subject is exciting, which is extraordinarily pressing. Thank you for all the pieces!
golden goose sneakers http://www.goldengooses.us
Reply lebron shoes
2:08 AM on May 16, 2022 
My husband and i got quite lucky that John managed to complete his analysis with the ideas he obtained while using the weblog. It's not at all simplistic to simply possibly be giving for free guidance which often men and women could have been selling. And we keep in mind we've got the blog owner to be grateful to for that. The type of illustrations you've made, the straightforward blog menu, the relationships you make it possible to promote - it's mostly fabulous, and it's facilitating our son in addition to the family know that this concept is brilliant, which is incredibly vital. Thanks for the whole thing!
lebron shoes http://www.lebronjames-shoes.us.com
Reply supreme clothing
2:07 AM on May 16, 2022 
I precisely had to thank you so much once more. I am not sure the things I might have done in the absence of those opinions discussed by you over that field. This has been the frustrating setting in my opinion, nevertheless observing a new skilled fashion you treated it took me to weep with delight. I am just happy for the work as well as pray you find out what a great job you happen to be accomplishing training the mediocre ones through your web site. I am sure you haven't encountered any of us.
supreme clothing http://www.supremeclothing.us.org
Reply off white shoes
2:06 AM on May 16, 2022 
I wish to express my admiration for your kindness supporting persons who actually need assistance with your subject matter. Your special dedication to passing the message all over ended up being rather beneficial and have all the time made somebody like me to reach their ambitions. Your entire helpful facts means a lot to me and substantially more to my mates. Many thanks; from everyone of us.
off white shoes http://www.off-whiteshoes.us.com
Reply kobe sneakers
2:06 AM on May 16, 2022 
I wish to point out my admiration for your kind-heartedness for individuals who really want help with your subject. Your personal dedication to getting the solution across appears to be extraordinarily powerful and have specifically made those much like me to get to their aims. Your new warm and friendly suggestions means a lot to me and somewhat more to my colleagues. Thank you; from all of us.
kobe sneakers http://www.kobesneakers.com
Reply yeezy 350 v2
4:04 AM on May 15, 2022 
I am writing to make you know of the beneficial experience my cousin's girl obtained reading your webblog. She noticed such a lot of things, most notably what it is like to have an ideal giving mindset to let most people with no trouble fully understand a number of extremely tough issues. You truly surpassed our expectations. Many thanks for giving such effective, trustworthy, explanatory and fun thoughts on this topic to Ethel.
yeezy 350 v2 http://www.yeezy350v2s.com
Reply yeezy boost 380
3:42 AM on May 15, 2022 
I wish to show thanks to you just for bailing me out of this type of situation. Just after surfing through the world wide web and seeing principles that were not pleasant, I thought my life was gone. Being alive without the presence of answers to the problems you've fixed all through your good guideline is a critical case, and the ones which might have in a negative way affected my career if I hadn't come across your web blog. That understanding and kindness in dealing with every item was crucial. I don't know what I would have done if I hadn't encountered such a step like this. I can at this moment look ahead to my future. Thank you so much for your expert and effective guide. I will not hesitate to endorse your site to anyone who should have support on this issue.
yeezy boost 380 http://www.yeezyboost380.us.com
Reply yeezy 350 v2
12:29 AM on May 14, 2022 
I want to point out my admiration for your kindness for men and women who absolutely need help with this one matter. Your personal dedication to passing the solution all around has been particularly productive and have without exception enabled professionals just like me to attain their endeavors. Your amazing informative facts implies this much a person like me and even further to my office workers. Thanks a ton; from all of us.
yeezy 350 v2 http://www.yeezy350v2s.com
Reply golden goose
12:09 AM on May 14, 2022 
I precisely needed to thank you very much yet again. I'm not certain what I would've gone through without those advice shown by you directly on that subject. It seemed to be the alarming concern in my circumstances, but discovering your professional fashion you treated that forced me to cry for contentment. I'm just grateful for this service and in addition expect you recognize what a powerful job your are undertaking training others with the aid of your blog. I know that you've never encountered all of us.
golden goose http://www.goldengooseoutletstore.com
Reply supreme clothing
12:07 AM on May 14, 2022 
My spouse and i felt quite relieved when John managed to complete his inquiry through the ideas he got when using the web site. It is now and again perplexing to simply be giving for free secrets that some other people have been making money from. So we realize we have got you to appreciate because of that. Most of the explanations you've made, the easy site menu, the friendships you make it possible to engender - it's got many excellent, and it's facilitating our son and our family feel that this matter is entertaining, which is exceedingly indispensable. Thanks for all!
supreme clothing http://www.supremeclothingstore.com
Reply supreme hoodie
12:06 AM on May 14, 2022 
I not to mention my buddies ended up reading through the great guides on your site and so before long developed a horrible suspicion I had not expressed respect to the blog owner for those strategies. Most of the young boys were consequently happy to learn them and already have in fact been taking advantage of those things. Thank you for turning out to be simply helpful and for selecting this sort of marvelous topics most people are really wanting to learn about. My sincere regret for not expressing appreciation to you sooner.
supreme hoodie http://www.supremes-clothing.com