Thysanozoon brocchii (Risso, 1818) Grube, 1840

(Fig. 2 k)

Habitat. 4 specimens were collected from mussel beds and under rocks.

Locality. Bizerta lagoon (37° 13' 19.29" N; 9° 55' 49.94" E), lagoon of Ghar El-Melh (37° 10' 09.81" N; 10° 13' 04.27" E) and Bouficha beach (36° 16' 48.36" N; 10° 29' 36.98" E).

Localities in Tunisia from bibliography. Ghar El-Melah lagoon (Gammoudi & Tekaya 2012; Gammoudi et al. 2011; Gammoudi et al. 2012a).

Other localities in the world. This species has a broad world distribution as it was recorded from the Mediterranean: Gulf of Naples (Lang 1884); coasts of Catalonia (Novell 2001) ; Murcia (Gammoudi & Tekaya 2012, Gammoudi et al. 2012a); Tarifa; Corse; Italy (Gammoudi et al. 2012a); Cape Verde (Laidlaw 1906); Suez canal (Palombi 1928); Croatia (Steinböck 1933); USA (Pearse 1938); East London (South Africa) (Palombi 1939) ; Japan (Kato 1944); Brazil (Marcus 1949); Colombia (Quiroga et al. 2008); Argentina (Brusa et al. 2009); Persian Gulf (Maghsoudlou & Rahimian 2014); British coasts (Howson & Picton 1997); Atlantic ocean (Noreña et al. 2014).