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
There is no special name. The term irregular is not appropriate because a rhombus is irregular but it has equal sides.
Irregular 3-dimensional shapes.
In art, shapes that suggest forms found in nature are called organic shapes. These shapes are often irregular and fluid, resembling the curves and contours of natural elements like plants, animals, and landscapes. They contrast with geometric shapes, which are precise and mathematically defined. Organic shapes evoke a sense of movement and spontaneity, contributing to the overall expression of a work.
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