Animals with irregular shapes are commonly referred to as "asymmetrical" or "irregular" animals. This term is often used in Biology to describe organisms that do not have a symmetrical body structure, such as certain types of sponges, some echinoderms like sea cucumbers, and various invertebrates. Their unique shapes can result from adaptations to their environments or specific ecological roles.
An irregular tessellation is a tesselation made of irregular shapes. Escher is famous for drawing these with animals in them.
Irregular shapes are all around. Most shapes are irregular.
irregular galaxy
Meteors
Irregular 3-dimensional shapes.
There is no special name. The term irregular is not appropriate because a rhombus is irregular but it has equal sides.
boogers
Irregular galaxies have no discernible shape.
Regular shapes are both equilateral and equiangular. Irregular shapes may or may not be equilateral and equiangular.
All 7 sided shapes are called heptagons.
boogers
Geometric Shapes