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 golden goose shoes
12:10 AM on May 26, 2022 
I definitely wanted to construct a brief word so as to express gratitude to you for these splendid items you are writing on this site. My incredibly long internet research has at the end of the day been paid with excellent points to share with my neighbours. I 'd believe that most of us readers actually are definitely fortunate to dwell in a fabulous website with many wonderful people with very helpful points. I feel truly fortunate to have used your weblog and look forward to so many more pleasurable moments reading here. Thanks once more for everything.
golden goose shoes http://www.goldengoose-shoes.us.com
Reply stephen curry shoes
12:09 AM on May 26, 2022 
I needed to put you that little note so as to thank you so much yet again with the pleasant opinions you've featured on this site. It has been really wonderfully open-handed of you to provide unreservedly what numerous people would've marketed for an ebook to help with making some bucks for their own end, certainly given that you could possibly have tried it in the event you desired. Those techniques in addition worked to be a good way to be certain that someone else have the same zeal just as my personal own to figure out a whole lot more with respect to this matter. I know there are some more fun periods ahead for individuals that see your website.
stephen curry shoes http://www.stephcurryshoes.com
Reply supreme clothing
12:08 AM on May 26, 2022 
Thanks for every one of your hard work on this web site. Kim really loves working on investigation and it's really easy to understand why. Almost all know all of the compelling means you give effective strategies via your web blog and even inspire response from website visitors on the subject plus our own child is in fact studying a great deal. Take advantage of the remaining portion of the year. You're the one carrying out a dazzling job.
supreme clothing http://www.supremeshoodie.com
Reply curry shoes
12:07 AM on May 26, 2022 
I and also my friends were found to be looking at the great ideas from the website and then at once I got an awful feeling I never expressed respect to you for them. Most of the men happened to be for this reason warmed to study them and already have sincerely been taking pleasure in those things. Many thanks for being very kind as well as for opting for some superb resources most people are really needing to learn about. My personal honest apologies for not saying thanks to earlier.
curry shoes http://www.curry-6.us
Reply russell westbrook shoes
12:06 AM on May 26, 2022 
I must get across my appreciation for your kind-heartedness for folks that must have help on this particular study. Your personal dedication to passing the solution up and down was incredibly practical and have in every case helped regular people much like me to achieve their ambitions. The warm and friendly guideline signifies a great deal to me and far more to my fellow workers. Many thanks; from all of us.
russell westbrook shoes http://www.russellwestbrookshoes.us
Reply jordan 1 mid
1:37 AM on May 25, 2022 
I want to express my affection for your kindness for men who really want guidance on in this situation. Your special dedication to passing the message throughout appeared to be surprisingly valuable and has frequently empowered somebody just like me to achieve their endeavors. Your entire valuable useful information denotes a great deal a person like me and extremely more to my mates. With thanks; from each one of us.
jordan 1 mid http://www.jordan1shoes.us
Reply Maryglips
6:05 AM on May 24, 2022 
good pill pharmacy
Reply yeezy shoes
2:05 AM on May 24, 2022 
I must show my passion for your kindness in support of men and women that must have assistance with this area of interest. Your special commitment to getting the solution along had been extremely invaluable and have without exception encouraged guys and women much like me to get to their ambitions. The warm and friendly publication means a great deal a person like me and much more to my mates. Many thanks; from everyone of us.
yeezy shoes http://www.yeezy-sneakers.us
Reply supreme clothing
1:45 AM on May 24, 2022 
Thanks a lot for giving everyone an extraordinarily special opportunity to read in detail from this web site. It's usually very cool plus stuffed with amusement for me personally and my office peers to search your web site more than 3 times in one week to read through the latest tips you will have. And indeed, we're actually astounded with your extraordinary solutions served by you. Certain 2 tips in this posting are certainly the best we have all ever had.
supreme clothing http://www.supremes-clothing.com
Reply golden goose outlet
1:45 AM on May 24, 2022 
Thanks for all your work on this blog. Kim delights in getting into research and it's really easy to see why. Most people hear all of the compelling method you deliver practical items through this web site and therefore improve response from website visitors on this subject plus my princess is certainly studying so much. Have fun with the remaining portion of the year. You're performing a dazzling job.
golden goose outlet http://www.goldengooses.us
Reply supreme shirt
1:45 AM on May 24, 2022 
I simply wanted to send a quick remark in order to express gratitude to you for those splendid guidelines you are writing on this site. My rather long internet investigation has now been honored with reputable points to share with my neighbours. I would point out that many of us visitors are quite fortunate to live in a fabulous website with very many marvellous people with interesting tips and hints. I feel really blessed to have come across your webpage and look forward to really more cool minutes reading here. Thanks once more for everything.
supreme shirt http://www.supremeshirt.us.com
Reply lebron shoes
1:45 AM on May 24, 2022 
I wanted to post you the tiny note to help thank you so much over again for these great concepts you've documented on this website. This is quite seriously generous of people like you to make extensively all many people could possibly have marketed as an electronic book in order to make some money on their own, and in particular considering that you could possibly have tried it if you ever considered necessary. These advice as well acted like the great way to understand that many people have the same passion the same as my own to understand more on the topic of this condition. I am certain there are millions of more enjoyable opportunities in the future for people who check out your website.
lebron shoes http://www.lebronjames.us.com
Reply curry 7
1:44 AM on May 24, 2022 
I am only writing to make you understand what a cool encounter my wife's girl went through studying your site. She learned lots of pieces, not to mention what it is like to possess a marvelous helping heart to let other individuals smoothly know just exactly specified impossible subject matter. You really did more than readers' expectations. Thanks for coming up with those invaluable, healthy, revealing not to mention fun thoughts on the topic to Janet.
curry 7 http://www.curry7shoes.us
Reply golden goose
1:44 AM on May 24, 2022 
Thank you for all your labor on this web site. My mom enjoys participating in investigations and it's obvious why. A number of us learn all of the compelling mode you offer worthwhile secrets on the website and in addition welcome contribution from some other people on this article so our favorite simple princess is without a doubt being taught a lot. Enjoy the remaining portion of the new year. You're doing a very good job.
golden goose http://www.goldengoose-shoes.us.com
Reply yeezy boost 350
1:44 AM on May 24, 2022 
I want to express some appreciation to you for bailing me out of this predicament. As a result of looking throughout the world-wide-web and coming across ideas which were not beneficial, I believed my life was well over. Being alive without the approaches to the problems you have resolved as a result of this short article is a crucial case, as well as those that would have in a negative way damaged my entire career if I had not encountered your blog. Your good expertise and kindness in handling every part was invaluable. I'm not sure what I would have done if I hadn't discovered such a thing like this. I am able to now look ahead to my future. Thanks so much for the reliable and results-oriented guide. I won't think twice to recommend your site to anyone who should have support about this topic.
yeezy boost 350 http://www.adidasyeezyboost350.us.com
Reply kevin durant shoes
1:43 AM on May 24, 2022 
I and my pals have already been reading the great guides located on your site and quickly I had an awful feeling I had not thanked the blog owner for those tips. All the ladies are already totally thrilled to learn them and have now really been making the most of these things. Thank you for actually being indeed accommodating and also for having some marvelous areas millions of individuals are really wanting to discover. My very own sincere regret for not expressing appreciation to you earlier.
kevin durant shoes http://www.kevindurant-shoes.us.com
Reply jordan 4
1:43 AM on May 24, 2022 
Thanks a lot for giving everyone an extremely wonderful chance to check tips from this blog. It is often so ideal and as well , jam-packed with fun for me personally and my office fellow workers to visit your web site the equivalent of 3 times every week to find out the new stuff you have. And definitely, I'm usually impressed concerning the awesome pointers you serve. Some 1 tips in this posting are essentially the best we have ever had.
jordan 4 http://www.jordan4.us.com
Reply Markglips
11:48 PM on May 23, 2022 
lisinopril 5 mg india price
Reply michael jordan shoes
3:58 AM on May 23, 2022 
I must express my gratitude for your generosity giving support to individuals who have the need for help with this important concept. Your personal dedication to passing the solution up and down has been unbelievably advantageous and have usually enabled girls like me to attain their targets. Your entire warm and helpful useful information signifies a great deal to me and somewhat more to my office workers. Best wishes; from everyone of us.
michael jordan shoes http://www.michaeljordanshoes.us.com
Reply Ashglips
11:36 PM on May 22, 2022 
synthroid cheap price