[1] Jointed hydroids look like a child's drawing of a Christmas tree.

They have an upright stem with side branches that emerge in pairs and extend upwards from the 'trunk'.

[2] This colonial animal is found off the length of the South African coast down to 135m under water.

[2] Jointed hydroids live in sheltered areas and are common on the southern Cape coast.

The reproductive bodies are ovoid with a distinct depression in their apex.