Home > Invertebrates > Tunicates

Updated 3/25/2013

Phylum Urochordata

Tunicates or Sea Squirts

Sea Squirts are filter-feeding animals that are abundant in all oceans, attached to firm surfaces or drifting as zooplankton (salps).  They range from single animals, colonies of individuals, to compound forms within a common tunic.  Larvae possess a notochord therefore they are related to vertebrates.  They may be distinguished from sponges because of the tough outer skin or tunic.  Most are difficult to identify beyond family or genus.

 

HAWAII

Didemnum spp. 

DIDEMNUM

 

Eudistoma spp.

SAND TUNICATE

 

Botryllus spp.

BOTRYLLUS

 

Diazona spp.

DIAZONA

 

Aplidum spp.

APLIDIUM

 

Herdmania momus

HERDMAN'S SEA SQUIRT

 

Benthic species

SPECIES NOT IDENTIFIED

 

Pelagic species

SALPS

 

Pyrosoma atlanticum

PYROSOME

 

 


NORTHEAST PACIFIC

Cnemidocarpa fismarkiensis

SOLITARY TUNICATE