What are differences between a star fish and fish?

While both starfish and fish live in the ocean, they are very different creatures! Here's a breakdown of their key differences:

Starfish (also called sea stars):

* Phylum: Echinodermata (includes sea urchins, sand dollars, sea cucumbers)

* Body structure:

* Five-pointed radial symmetry (though some can have more arms)

* Hard, spiny exoskeleton (outer shell)

* No head, brain, or internal skeleton

* Movement: Uses tube feet, tiny suction cups, to move slowly across the seabed

* Feeding: Carnivores or scavengers, often using their arms to pry open shellfish

* Reproduction: Reproduce sexually by releasing sperm and eggs into the water, or asexually by regeneration (growing new arms)

* Other features:

* Regenerate lost limbs

* Can change color depending on their environment

* Can survive out of water for a short period

Fish:

* Phylum: Chordata (includes vertebrates like mammals, birds, reptiles, amphibians)

* Body structure:

* Bilateral symmetry (two sides that mirror each other)

* Gills for breathing

* Fins for swimming

* Scales covering the body

* Internal skeleton

* Movement: Swim using fins and their body shape

* Feeding: Vary greatly, some are herbivores, carnivores, or omnivores

* Reproduction: Most reproduce sexually by laying eggs, but some give birth to live young

* Other features:

* Have a heart and blood vessels

* Most have a swim bladder to control buoyancy

* Many have a lateral line system to sense vibrations in the water

In a nutshell:

Starfish are echinoderms with radial symmetry, no brain, and a unique way of moving using tube feet. Fish are vertebrates with bilateral symmetry, gills, fins, and an internal skeleton.