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Belize Star Fish - Is it (or) Is it Not a Fish?

7/29/2019

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12 Interesting Facts about Sea Stars

1.  Sea Stars Are Not Fish - Although sea stars live underwater and are commonly called "starfish," they are not true fish. They do not have gills, scales, or fins like fish do. Sea stars also move quite differently from fish. While fish propel themselves with their tails, sea stars have tiny tube feet to help them move along.  Because they are not classified as fish, scientists prefer to call starfish "sea stars."

2.  There Are Thousands of Sea Star Species - There are about 2,000 species of sea stars. Some live in the intertidal zone, while others live in the deep water of the ocean. While many species live in tropical areas, sea stars can also be found in cold areas—even the polar regions.

3.  Sea Stars Are Echinoderms  - Sea stars belong to the phylum Echinodermata. That means they are related to sand dollars, sea urchins, sea cucumbers, and sea lilies. Many sea stars have five-point radial symmetry because their body has five sections. This means that they do not have an obvious left and right half, only a top side and a bottom side. Echinoderms also usually have spines, which are less pronounced in sea stars than they are in other organisms, such as sea urchins.

4.  Sea Stars Can Regenerate Arms - Amazingly, sea stars can regenerate lost arms, which is useful if the sea star is injured by a predator. It can lose an arm, escape, and grow a new arm later. Sea stars house most of their vital organs in their arms. This means that some species 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.

5.  Not All Sea Stars Have Five Arms - While many people are most familiar with the five-armed species of sea stars, not all sea stars have just five arms. Some species have many more, such as the sun star, which can have up to 40 arms. 

6.  Sea Stars Do Not Have Blood - Instead of blood, sea stars have a circulatory system made up primarily of sea water. Seawater is pumped into the animal's water vascular system through its sieve plate. This is a sort of trap door called a madreporite, which is often visible as a light-colored spot on the top of the starfish.
From the madreporite, the sea water moves into the sea star's tube feet, causing the arm to extend. Muscles within the tube feet are used to retract the limb.

7.  Sea Stars Are Protected by Armor - Depending on the species, a sea star's skin may feel leathery or slightly prickly. Sea stars have a tough covering on their upper side, which is made up of plates of calcium carbonate with tiny spines on their surface. A sea star's spines are used for protection from predators, which include birds, fish, and sea otters. One very spiny sea star is the aptly named crown-of-thorns starfish.

8.  Sea Stars Have Eyes - Many people are surprised to learn that starfish have eyes.  It's true. The eyes are there—just not in the place you would expect. Sea stars have an eye spot at the end of each arm. This means that a five-armed sea star has five eyes, while the 40-armed sun star has 40 eyes.  Each sea star eye is very simple and looks like a red spot. It doesn't see much detail but it can sense light and dark, which is just enough for the environments the animals live in.

9.  Sea Stars Move Using - Their Tube Feet Sea stars move using hundreds of tube feet, which are located on their underside. The tube feet are filled with sea water, which the sea star brings in through the madreporite on its top side. Sea stars can move quicker than you might expect. If you get a chance, visit a tide pool or aquarium and take a moment to watch a sea star moving around. It is one of the most amazing sights in the ocean.  Tube feet also help the sea star hold its prey, including clams and mussels.

10.  All True Starfish Are in the Class Asteroidea - Starfish belong to the animal class Asteroidea.  These echinoderms all have several arms arranged around a central disk. Asteroidea is the classification for "true stars." These animals are in a separate class from brittle stars and basket stars, which have a more defined separation between their arms and their central disk.

11.  Sea Stars Have Two Ways to Reproduce - Male and female sea stars are hard to tell apart because they look identical. While many animal species reproduce using only one method, sea stars are a little different. Sea stars can reproduce sexually. They do this by releasing sperm and eggs (called gametes) into the water. The sperm fertilizes the gametes and produces swimming larvae, which eventually settle on the ocean floor, growing into adult sea stars. Sea stars can also reproduce asexually through regeneration, which is what happens when the animals lose an arm.

12.  Sea Stars Eat With Their Stomachs - Inside-Out Sea stars prey on bivalves like mussels and clams, as well as small fish, snails, and barnacles. If you've ever tried to pry the shell of a clam or mussel open, you know how difficult it is. However, sea stars have a unique way of eating these creatures. A sea star's mouth is on its underside. When it catches its food, the sea star will wrap its arms around the animal's shell and pull it open just slightly. Then it does something amazing. The sea star pushes its stomach through its mouth and into the bivalve's shell. It then digests the animal and slides its stomach back into its own body.  This unique feeding mechanism allows the sea star to eat larger prey than it would otherwise be able to fit into its tiny mouth.

Here's an Interesting Fact about Starfish or Sea Stars - They have hundreds of tiny projections known as tube feet on the underside of their body. The starfish actually has two stomachs. The cardiac stomach eats the food outside the starfish's body. When the cardiac stomach comes back into the body, the food in it is transferred to the pyloric stomach.
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    Trent S. Turley

       My name is Trenton S. Turley, and I am a Belizean citizen who has now been living in the country of Belize for the past 15 years.  I am also an environmental activist.  Our family moved to Belize, when I was 8 years old.  I speak English, Spanish, Kriol and American Sign Language.  I have a true love for the eco-system of Belize, with regards to preserving this beautiful countries resources.
       I am presently a licensed tour guide (trained to international standards), for the Government of Belize.
       This blog is about Belize and all the things I'm passionate about.  If you're in Belize, look me up. Hope you enjoy my posts.


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    Is located on the island of Ambergris Caye, directly across from the Belize Barrier Reef, off the mainland coast of Belize.  The property is nestled in a cluster of Australian Pine trees, backed to a littoral jungle, and surrounded by tropical gardens.  It's about a one minute walk from the property to the beach, and a 10-15 minute drive from the island airstrip to the property. 

    We offer one bedroom suites (455 s.f.) of living area to include:  livingroom, kitchenette, private bathroom and bedroom.

    We are also about a one minute walk from one of the best restaurants on the island serving (breakfast, lunch & dinner).  Within walking distance you can find:
    (3) blocks is Robyn's BBQ
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    IF  YOU'RE COMING TO BELIZE TO...............
    If you're coming to Belize to dive the Blue Hole, descend the shelf walls at Turneffe, snorkel the Barrier Reef, explore Mayan ruins, rappel into a cave, kayak along the river through caves, zip line through jungle tree tops, hike through a cave to see an ancient human skeleton, swim with sharks, listen to Howler Monkey's, hold a boa constrictor, feed a jaguar, horseback ride through the jungle, canoe through a cave, rappel down a waterfall, sail around an island, enjoy cocktails & dinner to a sunset, climb 130' feet to the top of a Mayan ruin, rip up the jungle trails on an ATV, float through a series of caves on a tube, and sip on a rum punch.....
    then this is the place for you. 
    Belize Budget Suites, offers you clean, affordable, attractive, accommodations, at prices that allow you to do all the things just mentioned. 

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  • HOME
  • BOOK NOW
  • ABOUT BELIZE
    • COVID-19 Update >
      • Covid Update - FAQ
    • Where is Belize?
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      • International Flights & Airlines
      • Belize Visas & Immigration
      • Arriving in Belize
      • Belize Land Borders
      • Getting to the Island
      • Departing Belize
      • What to Bring
      • How To Save Money
    • Best Time to Visit
    • Know Before You Go
    • Is Belize Safe?
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      • Chocolate Festival
      • Lobster Festival
      • Mango Festival
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  • ABOUT US
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    • FAQ
  • ACCOMMODATIONS
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    • Reservation Info.
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    • Diving >
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      • Diving Turneffe Atoll
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      • Night Diving
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