invasive_tunicate_Didemnum Vex_RI©JMacCausland_CAdd to Lightbox Download
They sometimes call this "Pancake Batter Tunicate" in Canada. When handled out of the water it is gloppy. (Didemnum vexillum) shown here as a persistent colony is fast growing and pervasive, covering everything in its path that doesn't move. It is pale yellow or beige and spongy, like a wet string mop when out of water. It is highly competitive, covering large areas. D.vex is believed to have originated from Japan but is now worldwide and considered a nuisance species. It is of serious concern to the shellfisheries.
Tunicates are invertebrates classified in the chordate Phylum because they have a dorsal nerve and notochord in their larval stage of development. They can be sedentarily attached or fee swimming (Salps). Individuals live a few years, but colonies likely persist and spread.
- invasive_tunicate_Didemnum Vex_RI©JMacCausland_C.tif
- Janet MacCausland
- Image Size
- 3889x5498 / 38.4MB
invasive tunicate Didemnum Vex Rhode Island USA Tunicate (Didemnum vexillum) Tunicates sea squirts invertebrates Chordate Phylum dorsal nerve notochord free swimming larval stage sedentary attached Invasive encrusting colony pervasive blanketing pale yellow beige spongy highly competitive D.vex Japan worldwide nuisance dorsal nerve concerning of concern shellfish industry
- Contained in galleries