Marine invertebrates have a large variety of body plans, which are currently categorised into over 30 phyla. Marine invertebrates are invertebrate animals that live in marine habitats, and make up most …

May 16, 2025 · Some invertebrate phyla have only one species, while others like Arthropoda include more than 83% of all described animal species with over a million species. The most common …

From crabs to octopuses, clams to marine worms, invertebrates play a significant role in ocean ecosystems. Many are important prey for fish, marine mammals, and humans. Others, such as …

This section contains facts and information about marine invertebrates along with a comprehensive list of common invertebrate species that live in different types of aquatic environments.

The world is largely dominated by invertebrates, far outnumbering vertebrates in both abundance and diversity. The same applies to the marine world and therefore there is great importance given to the …

Jul 17, 2025 · These creatures play essential roles in marine ecosystems, contributing to nutrient cycling, food webs, habitat formation, and overall ocean health. This article explores some of the …

Jan 26, 2024 · Marine invertebrates encompass a vast array of species that play critical roles in aquatic ecosystems. This introductory guide explores the incredible diversity of these organisms, their …

More than 90% of all animals are invertebrates and they are classified into at least 33 major groups, or phyla. Nearly every phylum of invertebrates has members that live in the oceans.

At Smithsonian Ocean, we have lesson plans, activities, and resources to help you engage your students in the wonders of our oceans. Jellyfish predate dinosaurs. How have they survived so long? …

Explore the major groups of marine invertebrates, animals that live in the sea and don’t have a backbone! Some of your favorite animals, such as octopuses, starfish, and jellyfish are all examples …