#ascidian

[moznohayanie]

ほやの赤ちゃん、かわいい

[drhoz]

A serene almost fairytale scene 18m below the surface in Twofold Bay, Eden, NSW. A pot bellied seahorse holds on to a sea tulip as a white ear fish visits. Filmed by ROV piloted by David Rowland, Undersea ROV.

[animalids]

Obese ascidian (Phallusia obesa)

Photo by Ron Greer

[splashing-water]

ascidian

[may-k-world]

いつぞやのホヤ、新鮮で美味しかった！😋 今年はお目にかからなかったなぁ…。

[dailydragondoodles]

bunch of bois, all belong to Bronzewing ^^

[scubadivingzero-blog]

I thought this looked like berries you could snack on, but Didemnum molle is a tunicate (animal) also known as a tall urn ascidian, green barrel sea squirt, and green reef sea-squirt.

[drhoz]

#1482 - Herdmania grandis - Mauve-mouth Ascidian

He chonky.

A large solitary tunicate, up to 20cm long. Fairly common in southern Australian waters, down to a depth of about 100m. This one was washed up at Port Kennedy, Perth, after the winter storms. 

Like most other tunicates, a filter-feeder with an inhalant and exhalant siphon, related to the vertebrates. They don’t look much like vertebrates as an adult, that’s for sure, but the larvae are tadpole-like and have a notochord. They may be social, or colonial, and many species are pelagic and in open ocean waters. One group, the Larvaceans, have tadpole-like adults that spin an enormous mucus house that they filter seawater through to extract microscopic plankton.

A few species are detritivores, a few are carnivorous, and some shallow-water tropical species have photosyntheic symbiotic algae. The name ‘tunicate’ comes from the rubbery tunic that they use as an exoskeleton. Its comprised of proteins and complex carbohydrates including a form of cellulose. 

Fossils of tunicates are rare, since they lack hard parts, but there’s a few species that might be them from the Ediacaran period, 635–541 million years ago. A few existing species are invasive, and some species thought to be native to Europe and North America probably aren’t.