While most fish scales are made of out cartilage (collagen), some fish (such as tilapia and carp) have scales that are made from chitin.
Fungi...
Keratin.
Grasshoppers have an exoskeleton (which is composed of chitin), but starfish do not.
Cell walls of fungi are similar to exoskeletons of insects because they are both made up of chitin. Chitin is made up of complex carbohydrates.
In a grasshopper, chitin is the strong yet flexible polysaccharide that forms the outer shell of a grasshopper (its exoskeleton).
Chitin
composed of chitin
chitin
While scales of fish are made of different materials (bone, cartilage, etc.), fish such as carp have scales that are made out of chitin (a polysaccharide that is both flexible and strong).
Protists
Cell wall .
The body covering of mosquitoes is chitin.
The cell wall of fungi is mostly composed of chitin. True fungi do not have cellulose in their walls. The cell membrane of fungi is composed of lipids (phospholipids, glycolipids and cholesterol) and proteins.
Fungi...
Not really. They outer body covering is called chitin.
KERATIN:)
Keratin.