Tuesday, 9 January 2018

FISH FACTS - PERPETUAL MOTION



Did you know a charging shark cannot stop. It can swerve but it can't swim in reverse. If it stops beating its tail it sinks.

Rays and skates, which have skeletons made of cartilage the same as sharks, have given up on the energy consuming task of constantly beating their tails. They have become bottom, dwellers. Their tails have become thin and whip like and some have developed poisonous barbs on the end

Tuesday, 19 December 2017

Back To The Future

In the movie Jurassic Park, scientists were able to breed dinosaurs using the DNA extracted from mosquitos trapped in amber. In reality the only DNA  would have been from the mosquito!

However, scientists have used chicken DNA to breed chickens with primitive characteristics like teeth. Did you remember that birds evolved from dinosaurs?


By 'switching on' inactive parts of the chickens DNA scientists may be able to breed chickens with dinosaur characteristics

Tuesday, 12 December 2017

Did You Know ... ?

The Cusk Eel is found 8.4 kms beneath the ocean's surface.

What would conditions be like for them ?
  • The high pressure would be a  problem
  • It's too deep for sunlight to reach.
  • It's very cold - about 1d Celsius 
 Giant Cusk Eel


Tuesday, 5 December 2017

Do Fish Mix With Other Fish? - Kim




Dear Kim,
Mostly fish hang with their own species, it's safer that way!
The bigger sarcopterygians could make a meal of the smaller species. 

Tuesday, 21 November 2017

How Big Are You? - J




Dear J,

I am about half a metre long, but I may still have a bit of growing to do .

My uncle is about 65cms long!

Hello Fishy, What Do You Eat? - Minu

Dear Minu,

I eat smaller fish in our billabong.

I am a carnivore but my little brothers and sisters and I could also be eaten by the bigger fish like Mandageria fairfaxii.

That fish is really the top predator in our billabong

Tuesday, 14 November 2017

Do Fish See Things In Colour? - J

Dear J,

Fish eyes are generally similar in structure to the eyes of other vertebrates. Many species of fish have colour vision and some can even see ultraviolet which I'll bet you can't. You must remember that water absorbs lighht so it gets dimmer and darker the deeper you go. Shorter wavelengths of light (colours like blue & violet) penetrate deeper in the water than the longer wavelengths (red, orange)
(red, orange)