Tritonia striata

Tritonia striata  Haefelfinger, 1963

Tritonia striata by Enric Madrenas










































Tritonia striata  Haefelfinger, 1963

 Classification according to Bouchet et al. (2017)
Taxonomic source: World Register of Marine Species (AphiaID: 141739).
This is a member of Tritoniidae that can reach 15-20 mm in length. The body is high, semitransparent and with a quadrangular section. The viscera, coloured light brown, are visible by transparency from the head region to the third pair of dorsal papillae. The head has a cephalic veil with three pairs of white digitations, often of unequal size. Several black lines cross the back and side walls of the body. There is a continuous mediodorsal black line that forks into two at the front of the body, passes in front of the rhinophores and continues back along the side walls of the body, on the right side passing right above the genital papilla. On the side walls of the body there can also be 1-2 sometimes dashed black lines. The base of the dorsal arborizations there are curved black lines. The rhinophores are formed by several leaves with whitish lamellae, protected by a white sheath with a slightly wavy upper edge; the white apex of the rhinophores is club shaped. The eyes are located right in front of each rhinophore. There are up to 5 pairs of branched dorsal papillae with irregular lamellae. At the base of each dorsal papilla there are 1-2 small black spots.

This species is relatively common in dimly lit rocky walls with plenty of sponges, cnidarians and scyaphyllic algae. It has been cited feeding on the anthozoan Paralcyonium elegans.


  • Tritonia. The genus Tritonia is dedicated to Triton, in Greek mythology the god of the sea, son of Poseidon and Amphitrite, portrayed as having the head and trunk of a man and the tail of a fish.
  • Striata, from the word “stria” which means a series of repeated lines, with aesthetic appeal, found in nature, rock formations, good art, and pleasantly wrinkled skin.

This is an eminently Mediterranean species but it has been cited in the Gulf of Biscay and the Straits of Gibraltar. In the Iberian Mediterranean it has been located in all the coasts and in the Balearic islands. In Catalan waters it has been frequently cited in many localities of the Costa Brava.

Known georeferenced records of the species: Tritonia striata
: GROC 2010-2011
: Enric Madrenas
: João Pedro Silva
: Bernard Picton
: Manuel Ballesteros.
: M@re Nostrum
: Altres fonts
: Marine Regions

References for the species: Tritonia striata

    Cantabria: Ávila Escartín (1993). Gibraltar: Sánchez Santos (unpubl. data). Andalucía (Med.): Moreno and Templado (1998), Sánchez Tocino, Ocaña and García (2000a). Levante: Templado, Talavera and Murillo (1987), Templado et al. (2002). Catalunya: Ros (1975, 1978), Ballesteros (1980, 1985), Pereira (1981), Altimira et al. (1981), Huelin & Ros (1984), Martín et al. (1990), Ávila (1993), M@re Nostrum [Illa Mateua (L'Escala) 9/1998, Mar Menuda (Tossa de Mar) 11/1998]. Todos los registros anteriores a 1985 como Duvaucelia. Baleares: Wirtz and Debelius (2003), Ballesteros and Templado (unpubl. data).

    General: Cattaneo-Vietti, Chemello, & Giannuzzi-Savelli, 1990:141[P]; Perrone, 1986a:24; Schmekel, 1970:174; Schmekel & Portmann, 1982:146

    Sources: Cervera et al., 2004, Ballesteros, 2007 & 2016, McDonald, 2006 and other sources.


    Western Mediterranean:3 out of 5 stars
    Eastern Mediterranean:0 out of 5 stars
    Atlantic Ocean:0 out of 5 stars

This chart displays the monthly observation probability for Tritonia striata based on our own records.


Tritonia striata by Pascal Girard


More pictures


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Further reading

Cite this article as:

Ballesteros, Manuel, Enric Madrenas, Miquel Pontes (2012-2020) "Tritonia striata" in OPK-Opistobranquis, Published: 16/05/2012, Accessed: 14/07/2020 at (

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