FreeTiiuPix.com

Free picture /  image resources for personal and non-commercial use.
Great for student & teacher research materials, projects, lesson plans or wallpaper!

By downloading these images and materials you are agreeing to our TERMS & CONDITIONS OF USE. PLEASE READ THESE CAREFULLY since they contain usage instructions and restrictions! Also, you may not sell these Images or redistribute them as part of a collection.  Unless indicated that an image has a model or property release, no such release exists.  FreeTiiuPix gives no representations or warranties with respect to the use of names, trademarks, logos, uniforms, registered copyright designs or works of art depicted in any image and you must satisfy yourself that all necessary rights, consents or permissions as may be required for reproduction are secured.

Please note, due to image abuse, we have had to remove all high resolution images.
Large images are now only available via
email request.

 [ Home ]   [ Terms of Use ]   [ About Me ]   [ Privacy/Cookie Policy ]   [ FAQ ]   [ FREE Photo Image Gallery ]  [ FREE Slide Presentation Gallery ]

 FREE IMAGE 
CATEGORIES

Go to the
Main Photo Gallery
to view all image
categories or use the
  Quick Links below
to jump to the
most popular images.

Animals








____________________


____________________


____________________


____________________

Food

 


____________________



____________________



____________________

 


____________________

 


____________________

Nature






____________________

 


____________________



____________________



____________________


____________________


____________________


____________________

 


____________________


____________________



____________________


____________________


____________________

 

 

 

Free Images of Echinoderms

Note on large files:  Very large files may be bigger than your screen.  
Right click on any portion of the image showing and chose "save as". 

 

 

Echinoderms are a group of marine invertebrates that live in all depths of water.  "Echino" means spiny and "derm" means skin. They typically have an endoskeleton made up of plates or ossicles - some type of spiny structure on the outside.  Their bodies have arms or spines, a water-vascular system, and adhesive tube-like feet.  The center of their body has a mouth for feeding and their organs.

Examples include Starfish, Sea Urchins, Sand Dollars, Crinoids, Sea Cucumbers and Brittle Stars.

Did you know...

that there are about 6000 species of Echinoderms alive today?

 

Sea Urchin

Sea Urchins, sometimes called just "Urchins" used to be called Sea Hedgehogs because of their spiny similarities.  These animals are part of the Echinoidea class together with their close kin the Sand Dollars.  Bodies of Sea Urchins are slightly dome-shaped and have a flat underside.  Their shells are called a "test".  Tests are round and spiny and are from 3 to 10 cm across.

Sea urchins live on the ocean floor and eat both plants and animals.

Did you know...

that many a fine chef uses the "roe" or eggs of an urchin in their cooking?  In fact, it is a delicacy in some cuisines.  The roe is called "Uni" (oo-nee) in Japanese.

 

Anatomy of a Sea Urchin - Animal Fact Sheet

Medium jpeg - 621 x 480  Right click on above image and chose "save as".

Printable Pdf - 753 KB

 

 

sea urchin on sand ocean floor

Sea Urchin - 1 (Diadema setosum)

Medium - 640 x 480  Right click on above image and chose "save as".

Large - 3264 x 2448  -  Now only available upon request.

 

The genus "Diadema" has the longest spines.  Diadema setosum above has venomous spines.

 

spines of a sea urchin

Sea Urchin - 2

Medium - 640 x 480  Right click on above image and chose "save as".

Large - 2701 x 1886  -  Now only available upon request.

 

 

Sea Urchin shell

Urchin Shell (Test) - 1

Medium - 640 x 480  Right click on above image and chose "save as".

Large - 3493 x 2619  -  Now only available upon request.

 

Like other echinoderms, sea urchins develop five-fold symmetry as they mature.  Notice the five equally sized parts that radiate from their center.

 

Seach Urchin Shell Test png

Urchin Shell (Test) Png - 1

Medium - 640 x 480  Right click on above image and chose "save as".

Large - 4608 x 3456  -  Now only available upon request.

 

 

Bottom mouth of Sea Urchin

Urchin Shell (Test) - 2  Underside - Mouth

Medium - 640 x 480  Right click on above image and chose "save as".

Large - 4608 x 3456  -  Now only available upon request.

 

Strangely enough, it is the underside of this creature that contains the mouth - know as the Aristotle's Lantern.  Beside the mouth are five pairs of tube feet.

 

Bottom mouth of Sea Urchin Test

Urchin Shell (Test) - 4

Medium - 640 x 480  Right click on above image and chose "save as".

Large - 4608 x 3456  -  Now only available upon request.

 

 

Hand holding Sea Urchin shell

Urchin Shell (Test) - 5

Medium - 640 x 480  Right click on above image and chose "save as".

Large - 4093 x 3069  -  Now only available upon request.

 

The "bumps" on the calcite plate are the base of spines.  Note the rows of tiny pores through which tube feet project. 

 

Sea urchin shell.

Urchin Shell (Test) - 6

Medium - 640 x 480  Right click on above image and chose "save as".

Large - 4446 x 3335  -  Now only available upon request.

 

 

Sea urchin periproct anus.

Urchin Shell (Test) -7 - Periproct

Medium - 640 x 480  Right click on above image and chose "save as".

Large - 2683 x 2012  -  Now only available upon request.

 

Opposite the mouth on the top of the urchin's dome is the "periproct" which surrounds the anus.

 

Sea urchin top periproct

Urchin Shell (Test) - 8  Periproct

Medium - 640 x 480  Right click on above image and chose "save as".

Large - 4608 x 3456  -  Now only available upon request.

 

 

Interior cavity of a sea urchin

Urchin Shell (Test) - 9    Interior cavity looking in from the mouth.

Medium - 640 x 480  Right click on above image and chose "save as".

Large - 4608 x 3456  -  Now only available upon request.

 

 

Sea Urchin hollow interior cavity.

Urchin Shell (Test) -10  Interior cavity

Medium - 640 x 480  Right click on above image and chose "save as".

Large - 2730 x 2047  -  Now only available upon request.

 

 

Mouth of Sea Urchin

Urchin Shell (Test) - 11  Mouth

Medium - 640 x 480  Right click on above image and chose "save as".

Large - 4608 x 3456  -  Now only available upon request.

 

 

Interior of hollow sea urchin shell

Urchin Shell (Test) - 12  Interior cavity.

Medium - 640 x 480  Right click on above image and chose "save as".

Large - 4608 x 3456  - Now only available upon request.

 


 

Sea Stars

 

Sea creatures we used to call "Starfish" are now called "Sea Stars".  This name change was done by marine scientists to clarify that Starfish are not actually fish!  Instead, they are star-shaped Echinoderms that belong to the Asteroidea class and are closely related to Sea Urchins and Sand Dollars.

Did you know...

that typically, these invertebrates have a central body surrounded by five arms although some species have more than five arms.  Starfish come in a wide variety of colours with smooth, granular or spiny surfaces.

Right:  starfish_png_1  (266 x 235)
Download Large image here.  (405 x 358)

 

Did you also know...

that there are about 2,000 species of Sea Stars and Starfish alive today?

 

pink star fish

Pink Star Fish - 1

Medium - 640 x 480  Right click on above image and chose "save as".

Large - 3264 x 2448 -  Now only available upon request.

 

Back to Animal Gallery

Back to Main Gallery Index

 

 

 

 

 

FREE SLIDE SHOW PRESENTATIONS

 

Teacher created &
student approved !
Download image-
rich slide presentations.


 

LEARN HOW TO DRAW 
YOUR OWN CLIP ART


No artistic talent?
No problem!

Learn how to draw
your own clip art!

+ enjoy our small
 FreeTiiuPix original 
Clip Art collection.


 

VISIT OUR BLOG


Get lesson plan ideas,
learn about new 
image categories 
+ links to more educational websites.

Educatingcreatively.
blogspot.ca

 

HOW TO REFERENCE 
THIS & OTHER WEBSITES

 

I'm using information from your website - 
 how do I reference it?  

Learn about proper 
citation techniques 
+ links to online 
citation tools.


 

 

Get updates, 
tell your friends, 
please "like" us 
on your favourite
social network.

CONTACT ME

If you'd like to drop me a note to let me know if any of these images have been useful, I'd love to hear from you. I'm curious to see if my snapshots have been of benefit to you in some way.  Also, I'd like to hear what kind of images you'd like to see more of. 

 

 


Aquatic Animals

 

"Many men go fishing 
all of their lives 
without knowing 
that it is not fish 
they are after."

~ Henry David 
Thoreau ~

 

 

"I never drink water 
because of the 
disgusting things 
that fish do in it."

~ W.C. Fields ~

 

Fun Fish Facts


- Catfish have over 27,000 taste buds while humans have only 7,000.

 

 

- Sharks are the only fish that have eyelids.

 

 

- As a fish grows, the number of its scales does not increase.  Instead, each scale increases in size.  You can determine the age of a fish by the number of growth rings on the scales.

 

 

- Most fish have air bladders that help to keep them afloat.  Sharks don't have them and must either swim continually or rest on the bottom of the ocean.

 

 

Did you know...

that a fish can drown?  Since fish need oxygen just like we do, if there isn't enough oxygen in the water, they will drown.

 

 

 

 

[ Home ]   [ Terms of Use ]   [ About Me ]   [ Privacy/Cookie Policy ]   [ FAQ ]   [ FREE Photo Image Gallery ]   [ FREE Slide Presentation Gallery ]  

 

Copyright © 2012-2016  FreeTiiuPix - Tiiu Roiser.  All rights reserved.