Question

pointwise characteristics of shark​

Answer 1

Answer:

--Sharks are heavy fishes possessing neither lungs nor swim bladders.

--Their skeleton is made up of cartilage rather than bone.

--Most sharks keep moving to breathe and to stay afloat.

--They have pointed snouts.

--They have gills to breathe as a respiratory organ.

I hope this answer helps u...

Answer 2

Answer:

Shark :

• Shark is called Scolidon sorrakowah in scientific language.
• Kingdom : Animalia
• Phylum : Chordata
• Subphylum : Vertebrata
• Class : Chondrochthyes
• Genus : Scolidon
• Species : sorrakowah

Some important characteristics :

• They are widely found in marine water.
• They attack their prey with the help of their powerful jaws.
• The body is long, laterally compresses, spindle shaped and tapered at the end.
• The body canbe distinguished into head, tail and trunk.
• The ventral surface colour is pale and the lateral and dorsal surface colour is dark grey.
• The skin is covered with exoskeleton of placoid and dermal scales.
• The head is dorsoventrally flattened.
• The head had a large pair of circular eyes at the sides and a mouth ventrally crescentic.
• 5 pairs of gill slits present behind the eyes.
• Between the pelvic fins, a cloacal aperture is present.
• Male sharks have pair of claspers.