Chondrichthyes
What are Chondrichthyes?
Cartilage Fish
What are Agnathas?
Jawless Fish
What are Osteichthyes?
Bony Fish
What are subclasses?
a taxonomic category that ranks below class and above order/ secondary class.
Name 3 things that kill people more than sharks yearly.
Toilets, Cows, Dogs, Vending machines, ladders, and etc.
Are cartilage fishes restricted to only being viviparous?
no some cartilage fish are viviparous while other are oviparous.
What bones are Agnathas lacking?
Jaw Bones
How many gills do Osteichthyes have?
One pair of gill openings covered by an operculum
Name sea life that is in the subclass of Elasmobranchii (naked gill)
Shark, Rays, and/ or skates.
How big can Giant Oceanic Manta Rays get?
Grow up to 30 ft long with a 26 ft long wingspan.
What is the use for placoid scales/denticles?
directed backward used for protection or to reduce drag while swimming
Paired fins, scales, true fins, or swim bladders.
What is Osteichthyes layered by?
Mucus.
What is considered the most aggressive species in the subclass Elasmobranchii?
Bull Shark
What is the Chimaera lignaria commonly referred to?
Rat fish and/or Ghost sharks.
What is the importance of ampullae of Lorenzini?
This organ is responsible for the detection of weak electric field changes caused by the muscle contractions of their prey.
How do Agnathas feed?
using circular mouths with teeth to suck in food
What is their skeletal structure?
Agnathas have a bony skeletal structure.
What is the percentage of vertebrates on earth composing of the subclass Actinopterygii? (having rays)
50%
In what country did a oarfish wash up and later displayed in?
Japan.
What is their skeletal structure made of?
Cartilage
What is the body type of Agnathas?
Elongated and cylindrical body
What type of scales do Osteichthyes?
cycloid and ctenoid scales
How many described species that are consisted in Actinopterygii? (having rays)
Over 27,000 described species in the subclass.
What fish makes you sick as they are oily and filled with urea?
Western Indian Ocean Coelacanth.