Underwater Life: A World Full of Amazing Sea Creatures

A giant squid that measured 65 feet (20m) with its tentacles extended once washed ashore in New Zealand. Cuttlefish closely resemble squid but have a much thicker internal skeleton made of a porous chalky material called cuttlebone. Cuttlebone is often placed in household bird cages, giving the bird a source of calcium and a place to sharpen its beak.

Underwater Life: A World Full of Amazing Sea Creatures

By Mr Ghaz, October 26, 2010

Image Credit

Underwater Life: A World Full of Amazing Sea Creatures

Cephalopods

Image Credit

Cephalopods are a class of large, active animals with big heads and soft, fleshy bodies. They have long tentacles with suckers. They include the octopus, squid and nautilus. Only the nautilus lives in shells like most other molluscs. They have horny jaws and a tubular siphon that they use for both breathing and jet propulsion. They also have excellent sight. These animals can change colour very quickly to match their emotions. This is done through cells that cause the blue, red, orange, yellow, violet or black granules in skin-pigment cells to spread rapidly and become more detectable. Some have light-producing organs that when stimulated will produce a bright glow by a chemical process. In some areas octopuses and squid are important food sources.

Octopuses

Image Credit

Octopuses live in holes, caves and even in empty tins and jars on the bottom of the sea, emerging to feed on small fish and crustaceans, which they kill by ejecting a poison through their beaks. They move slowly, pulling themselves along by the suckers on their eight tentacles. If threatened, octopuses can discharge a cloud of ink from a special sac that acts like a smoke screen, giving them time to escape their enemies by a form of locomotion like jet propulsion. The entrance to the mantle cavity is shut off and the muscle of the mantle contracted quickly, causing a jet of water to shoot from the open siphon and propel the animal rapidly backward. This same siphon also draws water over the gills, thus giving the octopus its oxygen supply.

Image Credit

An octopus leaves its shelter in search of food. Its main diet is mollusks.

19
Liked it
29 Responses to “Underwater Life: A World Full of Amazing Sea Creatures”
  1. AFHodge Says...

    On October 26, 2010 at 12:40 pm

    This article is well penned/composed and the photos are brilliant.


  2. albert1jemi Says...

    On October 26, 2010 at 12:47 pm

    great share


  3. webseowriters Says...

    On October 26, 2010 at 1:26 pm

    A nice share


  4. BluSphere Says...

    On October 26, 2010 at 3:52 pm

    Amazing pictures and a great article all in all. I really liked the Cephalopod!

    Best regards,
    BluSphere


  5. wonder Says...

    On October 26, 2010 at 3:53 pm

    This sea document is fascinating.


  6. wonder Says...

    On October 26, 2010 at 3:54 pm

    This sea document is fascinatingly done as usual.


  7. Dragoonk Says...

    On October 26, 2010 at 1:57 pm

    Beautiful!!


  8. LoveDoctor Says...

    On October 26, 2010 at 4:43 pm

    This is a lovely article. Nice images and very informative post on marine animals.


  9. TwiKnight Says...

    On October 26, 2010 at 6:15 pm

    Fascinating creatures. Thanks for sharing. :)


  10. Citra Florenca Says...

    On October 26, 2010 at 9:03 pm

    Reminds me of late Paul the octopus :)


  11. CHAN LEE PENG Says...

    On October 26, 2010 at 9:47 pm

    Underwater is fascinating. Nice pics and also well-composed. :-)


  12. J Anderson Says...

    On October 26, 2010 at 10:09 pm

    Good Post


  13. strategy03 Says...

    On October 26, 2010 at 11:48 pm

    Great writing. I like this


  14. elly green Says...

    On October 27, 2010 at 1:17 am

    your writing are so full of mystery an wonder i love reading them .


  15. Christine Ramsay Says...

    On October 27, 2010 at 6:17 am

    You are a great educator. I have learnt so much from reading your wonderful articles and this is no exception. Well done.

    Christine


  16. SharifaMcFarlane Says...

    On October 27, 2010 at 7:21 am

    Really interesting. What percentage of those eggs survive to adulthood?


  17. GodsGrace Says...

    On October 27, 2010 at 8:05 am

    Nice Post


  18. nsmazry Says...

    On October 27, 2010 at 11:48 pm

    Good share. wonderful presentation. keep em’ coming


  19. papaleng Says...

    On October 28, 2010 at 9:16 am

    They’re really are underwater beauties. highly informative post.


  20. sandcastle Says...

    On October 28, 2010 at 11:16 pm

    Thank you for this very informative and for the enjoyable read! I love the images as well!


  21. Mansor Says...

    On October 29, 2010 at 12:28 am

    Great share as usual. really enjoyed read. Thanks Mr G!


  22. Idazalee Says...

    On October 29, 2010 at 12:34 am

    very interesting and informative article. liked the photographs..so beautiful! Thank you ghaz :)


  23. Anuradha Ramkumar Says...

    On October 29, 2010 at 11:10 pm

    Underwater life is definitely amazing.


  24. Anila Arshad Says...

    On January 8, 2011 at 7:03 am

    Wow that is so so amazing pictures for me today my presentation on water life and its help me a lot…..Thanks


  25. Monica Khuth Says...

    On January 11, 2011 at 7:04 pm

    I am always amazed by everything that lives in the sea . loved this article .


  26. nicole escolano Says...

    On February 27, 2011 at 5:47 am

    i love sea creatures and i’m begining to care and study about them and i never stop studying sea creatures and help them from pollutions and other destructive things aroungd them :) )))


  27. nicole escolano Says...

    On February 27, 2011 at 5:53 am

    wow!!thos are such fascinating characteristics of octopuses very interesting and wonderful photography :D . age:12


  28. News365 Says...

    On March 23, 2012 at 8:42 pm

    Amazing animals! Good article!


  29. Candy Says...

    On July 30, 2012 at 9:38 pm

    Beautiful pictures, but it’s ‘octopi’ not ‘octopuses.’


Post Comment
comments powered by Disqus