A "lure".
The thing on the angel's head is called a halo.
it is called the crest
an anglerfishes lure is made of bacteria that builds up inside the body and when the old lot refreshes the new lot comes up
The thing on top of Toad's head is called a Mush.
it is called a death mask
A bean sprout.
It is a tusk.
A comb
Akanishta
Mount Rushmore.
It is called the Comb.
a hat