Aquatic invasive species

CLUBBED TUNICATE

(Styela clava)

The Clubbed tunicate is an invasive solitary tunicate from the Western Pacific. It is one of the worst invasive alien species in the world. It has been reported in the Gulf of St. Lawrence in Prince Edward Island since 1997.

HABITAT

See the habitat of the tunicates

Clubbed tunicate - DFO

CHARACTERISTICS

  • Body firm and wrinkled with little bumps, shaped like a water-filled wineskin. Presence of a solid stalk. Leathery texture;
  • Measures up to 18 cm, the stalk accounting for one third of its length;
  • Colour brown;
  • Solitary, but may grow in very dense clumps.

SIMILAR SPECIES

Sea potato - DFO  C. Nozères

Sea potato
DFO C. Nozères

Among native species, sea potatoes and sea peaches are other tunicates, but they are solitary or found in small groups. The sea potato is shaped like a rattle and has a stalk that can reach 13 cm. The sea peach's body is firm and rounded and its skin is rough.

See Vase tunicate and European sea squirt
Sea peach - DFO  C. Nozères

Sea peach
DFO C. Nozères

ECOLOGICAL AND ECONOMIC IMPACTS

WHAT YOU CAN DO