Very special thanks for the first photo of Pachycerianthus longistriatus to John Turnbull, Marine Explorer, Australia.
John has taken his photo at Clifton Gardens, Sydney, New South Wales, Australia.
Short description based on the original description of Scott Carter from Taronga Zoo Aquarium, Mosman, Australia:
Coloration of live animals.
The column is purple aborally merging to brown orally, the brown coloration may vary from dark to pale yellowish brown.
The marginal tentacles (138-140) all have a pale longitudinal stripe on each side with oral and aboral faces coloured,
which gives them a distinctly striped appearance.
The labial tentacles number 130 -139, colour: pale cream.
Two tentacle colour forms exist: one pale yellowish brown the other deep purplish maroon, the oral disc is deep brown in colour.