Best answer
There are an estimated 1.3 million species of invertebrates found all around the world and they make up about 97% of all the animal species of earth. Fish are consideredvertebrates(with a backbone),and most fish have scales,fins,and gills. Fish use their gills to breathe,but some types of fish have lungs as well,and can breathe out of water for long periods of time.
People also ask
How do invertebrates differ from each other?
The internal anatomy of the invertebrates differs from each other. Some may have respiratory, excretory and circulatory organs and in some species these organs may be absent. With 2 million known animal species on earth nearly 95% of the animals are invertebrates.
What animals are invertebrates?
Other animals that are considered as invertebrates are spiders, worms, snails, centipedes, clams, jellyfish, crabs and squid. All the species that belong to invertebrates have their own life cycle.
What are invertebrates and why do we protect them?
We are also responsible for protecting invertebrate species listed under the Endangered Species Act such as white abalone and elkhorn coral. Invertebrates are the most diverse group of animals in the ocean. Some common marine invertebrates include mollusks, crustaceans, and corals.
What is an aquatic invertebrate?
Aquatic invertebrates are a diverse group of organisms that inhabit IRES throughout the world, in regions spanning alpine, arid, Mediterranean, polar, temperate, and tropical climates. Rachel Stubbington, … Ross Vander Vorste, in Intermittent Rivers and Ephemeral Streams, 2017