Mollusks Landing

Page Purpose

You have chosen a career to follow and prepare for, now it’s time to learn more about the species (and breeds) you will work with. 

Read about the basic facts and join the Mollusks Group to learn even more about them, as well as how to work with them, and how to gain experience if you want to work with them. If you are not a member, join us in the OZT Community!

Definition of Mollusks

Crustaceans are generally aquatic and differ from other arthropods in having two pairs of appendages (antennules and antennae) in front of the mouth and paired appendages near the mouth that function as jaws

Basic Facts

Length Icon

Average Length

up to 10 meters (33 feet)

Weight Icon

Average Weight

up to 500 kg (1,100 lb)


Average Lifespan

up to 500 years


Average Offspring

up to 200,000 eggs


Swimming Speed

40 km/h (25 mph)

Activity Period Icon

Active Time

Day and Night

Main Diet Icon

Main Diet


Habitat Icon

Distribution & Habitat

Most countries and seas - freshwater rivers, lakes, caves, oceans

Global Population

Estimated Global Population

Not determined het

Reference Icon

Conservation Status

Least Concerned to Near Extinct

Do you have information that you would like to contribute to this course? Please click on the red beetle to access the contribution form.

OZT Community Logo

Join the Mollusks Group

Status: Active

Learn even more about Mollusks by joining the GROUPS.

Members of the Group can access all the different Short Courses, win awards and meet other mollusks lovers from around the world. Gain experience points with each short course and compete for the top spot on the leader board!

Topics covered in the MOLLUSKS GROUP:

  • ^ General mollusk knowledge (Anatomy, Habitat, Behaviour, Diet)
  • ^ Ecological Benefits & Conservation
  • ^ Creative (Including education, art, design, publishing, media, news and photography)
  • ​^ Species (courses on over 100 different species)


This is also the place where you will find links to all of the Animal Organizations that work with mollusks. Join their special Groups and learn how you can gain valuable experience by volunteering or interning with them.

Career profiles and resources

Contributions by expert members are always appreciated to allow the students to make informed decisions. Please add your contribution through the attached form:

Contribution Form

List of Species Educators who have contributed to the info:

One Zoo Tree

A few excellent pictures as examples of the species:

Links to some of the best websites: