Tim Laman / Split level of Spotted sea hare {Aplysia dactylomela} on root of Red mangrove tree {Rhizophora mangle} where it was grazing on algae. Tunicate Cove, Belize.

Pascal Kobeh / Black spotted / Ringed sea hare (Aplysia dactylomela), Canary Islands

Georgette Douwma / Sea hare (Aplysia sp). an unusually large congregation. Lembeh, Strait, North Sulawesi, Indonesia.

SCOTLAND: The Big Picture / Sea hare (Aplysia punctata) on red algae, Shetland, Scotland, UK, May.

SCOTLAND: The Big Picture / Seagrass (Aplysia punctata) bed with a sea hare, Scotland, UK, May.

Magnus Lundgren / Wild Wonders of China / Pygmy sea hare (Aplysia parvula) Pak Lap Tsai, Sai Kung, Hong Kong, China.

Jean E. Roche / Mottled sea hare (Aplysia fasciata) Salin de Giraud, Camargue, France.

Tony Wu / Hermaphroditic sea hares (Aplysia sp.) engaging in copulation and egg-laying in shallow water, at a depth of about five meters, Hiwasa, Japan. May.

Tony Wu / Close-up view of strands of multicolored Sea hare eggs (Aplysia sp.) Hiwasa, Japan, May.

Alex Mustard / Geographic sea hare (Syphonota geographica) swimming using its parapodial lobes as flapping wings. Anilao, Batangas, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Ocean.

MYN / Sheri Mandel / California brown sea hare (Aplysia californica), Malibu, California, USA, May, meetyourneighbours.net project

Christophe Courteau / Sea hare {Aplysia punctata} Brittany France