Stingrays - Worksheet for learners

in Education4 months ago

They live in the sea and when they move it is gracefully and looks like the are flying.  They are in the same family as sharks and they do not have bones in their bodies, but a skeleton made of cartilage.  The bendable part of your nose and your ears also are made of cartilage.  

source

Stingrays are a group of rays, consisting of eight families including the sixgill stingray, deep water stingray, stingarees, round rays, whiptail stingrays, river stingrays, butterfly rays and eagle rays. 
  • Find a picture or a video of each of these types of rays.

Most of the species of stingrays, and there are 70 types, are found in the warmer tropical oceans.   Some species do live in rivers in freshwater.

On the tail of the stingray you will find a 'hook' which is called a 'barb' that is venomous that is used to sting a person or predator when it is protecting itself.  The venom can kill a human.  This is what happened to the legendary wild live conservationist Steve Irvin.  You can read more about it here.

They have flat bodies and this makes it easier to dig in the sand and lay on the bottom, very still to hide from predators like sharks and large fish and sea lions.

The eyes of the stingray is on the top of its body and the gills, nostrils and mouth underneath.  The stingray has difficulty seeing their prey so they will use their smell and 'electro receptors' to find their food.  They eat sea snails, crabs, oysters and small fish.

Some stingrays 'fly' through the water by moving their fins up and down and other species will move their whole body from side to side.

Some of the stingray species can become very big, up to 14 feet, and they can also get up to 15 to 25 years old.

In some cultures the stingray is grilled and eaten and they also use the skin to make boots, shoes, belts and wallets,  Their skin is a lot like leather.

  • Watch the video and answer the questions

source

  1. Which is the biggest stingray?
  2. How will a stingray hide?
  3. What is the function of their electronic sensors?
  4. How does a stingray swim?
  5. What is the function of the tail?
  6. When do they breed and how many babies does the female give birth to?
  7. What does the babies look like?