young, 2.5 mm
Placida cremoniana (Trinchese, 1893)
|Maximum size: about 14 mm.
is a distinctive species with a pale orange body that has only a
small cream flecks. The distal half of the cerata, the dorsal surfaces
of the rhinophores and the sides of the head are velvet-black.
is a moderately rare species found in moderately exposed to highly
exposed rocky habitats at depths of < 1 to 3 m (< 3 to 10 ft). It
shows a diurnal activity pattern when held and secretes a very strong
mucous "drag-line" when dislodged. It may also release opaque, defensive
mucus when disturbed in a manner similar to some other sacoglossans. (Note 1) It lays a flattened, cream egg mass
that hatches in about three days in the laboratory.
Big Island, Maui and Oahu: circumtropical.
recorded in Hawaii from Kalepolepo, Maui by PF on Nov. 18, 1991.
Photo: CP: 11
mm: Ulua Beach, Maui; April 2, 2005.
Observations and comments:
1: Narrissa Spies, referring to an
animal about 14 mm in length found in a sea table at the Kewalo Marine
Laboratory, reported that "...when we agitated it to move it away from
the side of the dish for photos, it released a burst of iridescent blue
mucus (this happened twice in response to our probing)."