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Species Covered


Ascidiacea (commonly known as the ascidians or sea squirts), is a wide class in the subphylum called Tunicata (also known as Urochordata). Ascidians are present throughout all over the world's seas and oceans. These species are characterized by a tough outer "tunic" made of the polysaccharide cellulose.



Find ascidian gene models showing nucleotide or protein sequences similarity to your gene of interest

Genome Browser


Visualize gene models and other functional annotations in their genome context

Genome Annotations


Explore ascidian gene models, cis-regulatory sequences, and other genomic features based on their functional annotations



Explore the identity, morphology and relative position of anatomical territories of developing ascidian embryos and larvae

Gene Expression & Function


Explore gene expression profiles, cis-regulatory sequence activity and the effect of perturbations in gene function



Search the ascidian literature for authors, genes, biological processes

How do I search for a molecular tool?

Aniseed supports the description of expression patterns and phenotypes in response to perturbations of gene function. To define these perturbations, it uses the concept of "Molecular tool"...



Troubles Solved on embedded Washu epigenome browser in gene and species cards

In the last weeks, the embedded Washu epigenome browser in gene and species cards was experiencing some problems which are currently solved. You can now use it normally. Thank you for your understanding. ANISEED team.


Botrylloides leachii now in ANISEED !

You can now access following Botrylloides leachii data: 
- You can browse the genome here. (Blanchoud et al. Scientific Reports (2018))
- Find the list of gene models, transcripts and proteins here
- Access to the Botrylloides leachii species card here
- You can download all these data here (corresponding gff3 and fasta files).


Reminder: Gbrowse will soon die, get used to the new WashU genome browser.

Dear all,

As announced at the 9th International Tunicate Meeting and in the Aniseed 2017 paper in NAR, we introduced the WashU epigenome browser in replacement of Gbrowse 2.0, which is no longer maintained and developed.

For the first year the two browsers are coexisting (but many more data are present on WashU than Gbrowse). Starting from summer 2018, only the WashU browser will remain.  We encourage you to get ready for the shift by gradually shifting your own analyses to WashU if you have not done so yet. If you encounter any problems with this, let us know: this will give us time to find a suitable solution to help you out.

Thank you for your understanding. ANISEED team.


New expression data from Phallusia mammillata in ANISEED !

Thanks to the contribution of Remi Dumollard, ANISEED now host 458 new expression data from Phallusia mammillata corresponding to 53 genes !  
--> Check these new data here


Aniseed 2017 : New paper online

Dear all, the new ANISEED update paper published in the upcoming 2018 database issue of Nucleic Acids Research is now online:
--> Article (free access)
Thanks to the many contributors from the community who made this possible!