J: Ascidians 

Colonial ascidians, (Order Ascidiacea) 

          These come in a variety of colours and form, occurring in dense mats and are often mistaken for sponges. They can usually be distinguished by being softer, more jelly-like, without siliceous or calcareous spicules and lacking a canal system. Their free-swimming tadpole-like larvae are interesting because they have a primitive form of notochord which degenerates after metamorphosis.

J1 Orange Ascidian

                                           J1: Orange Ascidian

                                              Scientific name: Unidentified

 

J2 Brown Ascidian

                                         J2: Brown Ascidian

                                             Scientific name: Unidentified

 

J3 Red Ascidian

                                             J3: Red  Ascidian

                                              Scientific name: Unidentified

 

Solitary ascideans

      Sea Squirts (Family Styelidae) are reef and rocky shore dwellers. They have two openings, one for the inhalent current where plankton-rich water is drawn in, and the other for the exhalent. When squeezed, water shoots out of the exhalent opening, hence their common name. (Length up to 8cm).

 

J4 Sea squirt

                                                   J4: Sea squirt

                Scientific name :Polycarpa sp.