Description
Ectopleura dumortieri is very similar to Tubularia indivisa at first glance. The solitude standing is very characteristic for this hydroid and it will always be on a spot with strong currents. It is a little bit paler then T. indivisa and the stem has a different shape as well. T. indivisa has a double ring of tentacles and a stem with equal diameter, E. dumortieri has a single ring of tentacles and a stem that is smaller in diameter at the base. Reproduction is also different. E dumortieri produces small medusae that swim in the water. This explains the solitude standing.

Size
The maximum height of the stem is 100 mm. The tentacles can have a length of 15 mm.

Colour
The stem is yellow to brown with pink to red polyps and transparent tentacles.

Habitat
Ectopleura dumortieri prefers a strong current and will always attach to hard substrata. It can be found on depths between 2 and 10 m.

Distribution
North Atlantic Ocean, including Mediterranean Sea. South Atlantic and Indo-Pacific Oceans.