Invertebrate
An invertebrate was an animal lacking a vertebral column (or spine). The group included all animals except fish, reptiles, amphibians, birds, and mammals.

As an exozoologist, Edward M. La Forge studied invertebrates in the Modean system. This was one of the assignments Geordi La Forge recalled accompanying when describing his upbringing to Sutter in 2368. ()

During their attempts to teach an infant Changeling how to shapeshift in 2373, Doctor Mora suggested that he and Odo expose the Changeling to simple lifeforms such as algae, fungi, and then invertebrates. ()

Examples of invertebrates

Arthropods 
 Arachnids
 Insects
 Lobster

Cephalopods 
 Cuttlefish
 Octopus
 Squid

Mollusks 
 Clam
 Edosian slug
 Jumbo Romulan mollusk
 Jumbo Vulcan mollusk
 Nautilus
 Oyster
 Scallop
The Aldebaran shellmouth may also have been a mollusk.

Urchins 
 Palamarian sea urchin

Worms 
 See: Worm

See also 
 "Flotter meets the Invincible Invertebrates"

External link 
 
Lifeform classifications