Cyerce cristallina (Trinchese, 1881)  

"Head small, the short tentacles are rolled up. The relatively long rhinophores are split at the end. Foot transparent and colourless, broader than the body and divided by a furrow at 1/5 of the distance between anterior margin and posterior tip. Anus papilla yellowish, dorsal, slightly to the right of the median about halfway between the eyes and the cardial region. Papillae pointed, the upper part flattened and widened. There are no branches of the liver of other organs intruding the papillae, but in the uppermost part there are a few opaque with grains, probably gland cells. The colour of the papillae is greyish hyaline with a fine brownish violet pigment on the margin of the tip oand on the side which is carried upward. These coloured areas may or may not be connected. Papillae numerous, crowded, on both sides of the back in 2-3 rows which are prolongs to past the rhinophores. The papillae differ greatly in length but large and small ones alternate in a distinct pattern.

Body broader than high, flat on the upper side except for the bulging cardial region. Colour grey, transparent; head, rhinophores, and cardial region covered with brownish violet pigmentation. The eyes are placed in large unpigmented regions beyond the rhinophores. The compact green liver is dimly visible through the back. It fills the posterior part of the body cavity completely. Two branches extend forward, one on each side of the body, to past the rhinophores." (Swennen, 1961)

Other characteristics:

- penal stylet (Swennen, 1961)

Identification: The animal is translucent white with distinct reddish markings on the head and cerata. The body and inner part of the foot is a deep opaque red. The oral tentacles are translucent. The cerata are translucent with a red marking down the midline there are numerous large, leaf-like cerata on back. which are translucent with burgundy and white spots. Cerata often boarded with white. (Valdés et al., Caribbean Sea Slugs, 2006)