Ascidia paratropa : Glassy tunicate –The Race Rocks Taxonomy

glasstunicate

Glass tunicate image by Ryan Murphy. ID by Rick Harbo Sept 2014

Phylum Chordata,
Subphylum Urochordata,
Class Ascidiacea,
Order Enterogona
Family Ascidiidae
Suborder Phlebobranchia
Genus Ascidia
Species paratropa
(Huntsman, 1912)

 

 

 

 

 

This is a solitary tunicate, 10-15 cm tall.. We find these only occasionally at Race Rocks, sub-tidally  at about 10-15 metres. The colonial ascidians are always more abundant.

This file is provided as part of a collaborative effort by the students, faculty, staff and volunteers of
Lester B. Pearson College
Garry Fletcher, 2014

Return to the Race Rocks Taxonomy Index

Corella willmeriana: Tansparent sea squirt–The Race Rocks Taxonomy

rmcorella

Corella willmeriana : Photo by Ryan Murphy

Ryan took this picture of Corella underwater at Race Rocks. Note inside intestine and other internal organs.
From Wikipedia:
“Reproduction and Development
Hermaphroditic; ‘Corella willmeriana‘ breeds throughout the year. The eggs are fertilized in the atrial chamber, where they develop in to the free-swimming tadpole stage before released. Swimming larvae remain juveniles for <2 days before anterior adhesive organs allow for attachment to substratum. This triggers metamorphism, which entails enlargement of pharynx for filter feeding; the notochord is sucked back into body and is no longer present in adult form.”

Domain Eukarya
Kingdom Animalia
Phylum Urochordata
Class Ascidiacea
Order Phlebobranchia
Family Corellidae
Genus Corella
Species willmeriana (Herdman, 1898)
Common Name: transparent sea squirt

Go to the Taxonomy Index for Race Rocks

This file is provided as part of a collaborative effort by the students, faculty, staff and volunteers of
Lester B. Pearson College

 

Turbine Site Hydroid Survey- 2006

Chris Blondeau and Juan Carlos Yabar, did this survey to document the Invertebrates, particularly hydroids,sponges and colonial tunicates in the are where the turbine Piling was to be installed later in the year.

See other archived video with Pearson College Divers