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 one of the Arachnid Groups 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 an Arachnid

A group of small wingless invertebrate animals (arthropods), having a body divided into two parts, the cephalothorax and the abdomen, with four pairs of jointed legs.

The word Arachnida comes from the Greek for ‘spider’

Arachnid Species
Different Species of Arachnids

Basic Facts

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Average Length

0.1 mm to 48 cm (0.004 to 19 in)

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Average Weight

up to 4 kg (9 lb)


Average Lifespan

3 weeks to 25 years


Average Offspring

up to 120,000 eggs


Running Speed

up to 0.53 m/s (1.9 km/h or 1.2 mph)

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Active Time

Depends on species

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Main Diet

99% are Carnivorous

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Distribution & Habitat

Almost all countries, except the arctic regions - all habitats, except high and cold altitudes, as well as the oceans

Global Population

Estimated Global Population

In the trillions

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Conservation Status

Least Concern to Vulnerable

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Join one of the 4 Arachnid Groups

Learn even more about arachnids or specific species by joining one of the four ARACHNID GROUPS.

The current 4 Groups, according to the Orders:

  • ^ Arachnid (All Species, including mites, ticks, harvestmen, scorpions, spiders, their relatives and horseshoe crabs)
  • ^ Scorpiones – Specific Group only for Scorpions
  • ^ Araneae – Specific Group only for Spiders
  • ^ Xiphosura -Specific Group on Horseshoe Crab

​Members of the Groups can access all the different OZT Short Courses, win awards and meet other arachnid 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 ARACHNID GROUPS:

  • ^ General arachnid knowledge (Anatomy, Habitat, Behaviour, Diet, Ecological Benefits & Conservation)
  • ^ Arachnid Care & Health
  • ^ Arachnid Business and Design
  • ​^ Species (courses on over 50 different species)


This is also the place where you will find links to all of the Animal Organizations that work with arachnids. 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 Mentors/Educators who have contributed to the info:



A few excellent pictures of the species: