This would seem to describe the hagfish and lampreys. The description fails by saying that they resemble fish. Hagfish and lampreys are classified as jawless fish. They are fish, none-the-less.
Shape of Ficus leaf is chordate
When it is stretched out completely, the closest shape that resembles it is a triangle.
oval
Elliptical
It slightly resembles a butterfly.
Bones
Yes. It resembles a boot.
Orange
The shape is odd considering that it resembles a T-rex on a skateboard.
Fiddle. It resembles a violin in shape.
It roughly resembles a giant bean.
In geometry a 29 sided shape is referred to as an icosikaidigon. The shape closely resembles an 3 dimensional octagon.