Specificity and importance :
The MPA is also characterized by the presence of typical Mediterranean habitats and species. Such as Posidonia oceanica and Cymodocea nodosa meadows which can be affected by the increase in the turbidity of the waters. Molluscs are widespread with species such as octopus (Octopus vulgaris) and cuttlefish (Sepia officinalis) with some gastropods. In this environment there is the Noble Pen Shell Pinna nobilis , which reaches considerable sizes. The coralligenous habitat is developing also in low light areas. Among the species Mesophyllum lichenoides, Lithophyllum incrustans, Peyssonnelia squamaria and Peyssonnelia rubra.
The ravines and caves are also numerous with different sizes within the MPA of Portofino. Numerous fish approach the coast, such as anchovies (Engraulis encrasicolus), needlefish (Belone belone) and mullet, which are chased by larger fish such amberjack (Seriola dumerili) and tuna (Thunnus thynnus). There is no shortage of sharks such as stingrays, sea eagles and, occasionally, Mediterranean manta rays (Mobula mobular). Lately, Loggerhead turtles (Caretta caretta) are increasingly frequenting the MPA.