Invertebrates

1. Molluscs

1.1. The body is covered by a membrane called the mantle that can produce a shell that protects.

1.1.1. snail

2. Arthropods

2.1. Have an external skeleton

2.1.1. spider

2.1.2. ladybug

3. Worms

3.1. They have soft body and have no skeleton

3.1.1. worms

4. Echinoderms

4.1. The body is covered by a membrane called mantle.

4.1.1. sea star

4.1.2. octopus

4.1.3. sea cucumber

5. Sponges

5.1. The body is shaped sac and is perforated pores, where it enters the water.

5.1.1. sea sponges

6. Calenterats

6.1. The body is soft and have radial simmetry

6.1.1. medusa

6.1.2. coral

6.1.3. sea anemone