Groups of fishes Flashcards
What are the 3 main groups
- Chondrichthyes - (all Cartilaginous fish)
- Agnatha’s (all jawless fish)
- Osteichthyes (all bony fish)
Which group of fish is known as the jawless ones?
Agnatha’s
Which group of fish is known as the bony fish?
Osteichthyes
Which group of fish is known as the cartilaginous fish?
Chondrichthyes
What fishes are Chondrichthyes
sharks, skates, rays and chimeras
What fishes are Agnatha’s
lampreys and Hagfish
What fishes are Osteichthyes
all bony fish:
lungfish, salmon, clownfish and eels
What are characterisitcs of a Agnatha
- no paired fins
- a light-sensitive pineal eye
- Fertilization of eggs take place outside of body
What are characteristics of Osteichthyes
- skeleton of bone
- scales
- paired fins
- jaws
- have a leteral line through their body
What are the characterisitcs of a Chondrichthyes
- flexible skeleton made of cartilage
- paired fins
- hard scales
- two- chambered heart
- ventral mouth
What are the different water types?
- Freshwater
- Tropical freshwater
- Tropical marine
- Brackish (muddy)
What is freshwater
is the term given toaquarium fish that can withstand temperatures between about 15C and 25C.
what is tropical freshwater
freshwater fish are from the rivers in these climates and so live in fresh (unsalted) water.
What is tropical marine
A tropical marine climate isa tropical climate that is primarily influenced by the ocean.
What is Brackish water
water that is more saline than freshwater but less saline than true marine environments.
