40 Invertebrates Animals Names With Pictures, Facts, & Types

What are the invertebrate animals? Invertebrates are animals without backbones, including insects, mollusks, and arachnids.

Must Read: Animals Name (Complete List)

Invertebrates Animals Names

Below are 40 invertebrate animals name.

Coral Coral
Dragonfly Dragonfly
Slug Slugs
Millipede Millipede
Wasp Wasp
Snail Snail
Cricket Crickets
Termite Termite
Jellyfish Jellyfish
Scorpion Scorpion
Spider Spider
Lobster Lobster
Moth Moth
Mussel Mussels
Grasshopper Grasshopper
Sea urchin Sea Urchin
Beetle Beetle
Mosquito Mosquitoes
Starfish Starfish
Centipede Centipede
Bee Bee
Ladybug Ladybug
Clam Clams
Flea Flea
Cuttlefish Cuttlefish
Crab Crab
Butterfly Butterfly
Ant ant
Worm Worms
Fly Fly
Anemone Sea anemone
Praying mantis Praying mantis
Octopus Octopus
Oyster Oyster
Louse Louse
Squid Squid
Tarantula Tarantula
Caterpillar Caterpillar
Cockroach Cockroach

10 Examples of Invertebrates and Interesting Facts

Below are 10 examples of popular invertebrates and interesting facts.

  1. Octopuses: Have three hearts, blue blood, and nine brains.
  2. Jellyfish: Immortal species exist like the Turritopsis dohrnii.
  3. Giant Squid: Their eyes are the largest in nature.
  4. Coral Reefs: They’re actually colonies of tiny invertebrates.
  5. Butterfly: Caterpillar completely liquefies during the metamorphosis process.
  6. Starfish: Can regenerate the entire body from a single arm.
  7. Spiders: They use hydraulic pressure to move their legs.
  8. Snails: Can sleep up to three years continuously.
  9. Earthworms: They have five pairs of heart-like organs.
  10. Lobsters: They taste with their legs and feet.

Classification of Invertebrates and Their Characteristics

Invertebrates are animals that do not possess a backbone or vertebral column. They make up the majority of animal species on Earth and exhibit a wide range of forms and characteristics. Here is a brief classification of invertebrates and their key characteristics:

8 Groups Of Invertebrates

The 8 group of Invertebrates are:

1. Porifera (Sponges):

– Simplest multicellular animals.

– Filter feeders that live attached to surfaces.

– Lack true tissues or organs.

– Water enters their bodies through tiny pores and exits through larger openings called oscula.

2. Annelida (Segmented worms):

– Segmented bodies with repeated body segments.

– Examples include earthworms and leeches.

– Some species live in water (marine or freshwater) while others are terrestrial.

– Possess a digestive tract with a mouth and an anus.

– Many annelids have setae (bristles) on their bodies for movement.

3. Platyhelminthes (Flatworms):

– Bilaterally symmetric body plan.

– Flat, soft-bodied animals.

– Examples include planarians, tapeworms, and flukes.

– Some species are free-living, while others are parasitic.

– Lack a specialized respiratory or circulatory system.

4. Arthropoda (Insects, spiders, crustaceans):

– Largest phylum, including insects, arachnids, and crustaceans.

– Exoskeleton made of chitin.

– Jointed appendages and segmented bodies.

– Well-developed sensory organs, such as compound eyes.

– Varying numbers of legs depending on the group (e.g., insects have six legs, spiders have eight).

5. Mollusca (Snails, clams, squids):

– Soft-bodied animals usually protected by a hard shell.

– Muscular foot for locomotion.

– Varying body shapes and lifestyles.

– Examples include snails, clams, octopuses, and squids.

– Most have a well-developed circulatory system and a simple nervous system.

6. Coelenterata (Cnidaria) (Jellyfish, corals, sea anemones):

– Possess specialized stinging cells called cnidocytes.

– Radially symmetric body plan.

– Exist in both sessile (attached) and free-swimming forms.

– Examples include jellyfish, sea anemones, and corals.

– Some cnidarians have a medusa form (free-swimming) while others have a polyp form (sessile).

7. Nematoda (Roundworms):

– Unsegmented, cylindrical body shape.

– Found in diverse habitats, including soil, water, and as parasites.

– Many species are microscopic.

– Have a complete digestive system with a separate mouth and anus.

– Some nematodes are important parasites of plants and animals.

8. Echinodermata (Starfish, sea urchins, sea cucumbers):

– Radially symmetric body plan.

– Spiny skin and a water vascular system.

– Most have five-part symmetry as adults.

– Examples include starfish, sea urchins, and sea cucumbers.

– Many echinoderms have tube feet for locomotion and feeding.

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