- The name Cnidaria comes from the Greek word "cnidos" which means stinging nettle
- If you touch most of these you will be injected by barbed threads sometimes tipped with poison
- Thousands of species live in the world's oceans, from the tropics to the poles and anywhere in-between
- Some small species are found in rivers and fresh water lakes
- The four mains groups are Anthozoa, Cubozoa, Hydrozoa, and Scyphozoa
- Cnidarians are incredibly diverse in form
- They are armed with stinging cells called nematocysts
- Cnidarians are united based on the presumption that these nematocysts have been inherited from a single common ancestor
- If you touch most of these you will be injected by barbed threads sometimes tipped with poison
- Thousands of species live in the world's oceans, from the tropics to the poles and anywhere in-between
- Some small species are found in rivers and fresh water lakes
- The four mains groups are Anthozoa, Cubozoa, Hydrozoa, and Scyphozoa
- Cnidarians are incredibly diverse in form
- They are armed with stinging cells called nematocysts
- Cnidarians are united based on the presumption that these nematocysts have been inherited from a single common ancestor