Tony Wu / Male Leach's sea star (Leiaster leachi) broadcast spawning, releasing streams of sperm from its arms. Kagoshima Prefecture, Kyushu, Japan.

Jordi Chias / Giant Manta (Manta birostris) with Remoras (Remora brachyptera) attached to both wings, offshore Santa Maria Island, Azores, Atlantic Ocean

Jordi Chias / Mobula / Chilean devil ray (Mobula tarapacana) with remora (Remora brachyptera) and Amberjacks (Serila dumerilli) Santa Maria Island, Azores, Atlantic Ocean

Georgette Douwma / Green turtle (Chelonia mydas) with two large remoras (Echeneis naucrates) attached to its carapace, at rest on artificial reef. Mabul, Malaysia.

Christophe Courteau / Shore clingfish / Cornish sucker (Lepadogaster lepadogaster) portrait, Brittany, France, January.

Christophe Courteau / Shore clingfish / Cornish sucker {Lepadogaster lepadogaster} Brittany France

Michel Roggo / Brook lamprey (Lampetra planeri) showing sucker, Europe

Shane Gross / Loggerhead sea turtle (Caretta caretta) with two Remora fish (Echeneididae) above sea floor. Bahamas.

Shane Gross / Black grouper (Mycteroperca bonaci) with Remora fish (Remora sp). Caribbean Sea off Gardens of the Queen National Park, Cuba.

Pascal Kobeh / Close-up of the head of a White tip shark (Triaenodon obesus) laying on the bottom with a Remora (Echeneis naucrates) on its head, Sulu sea, Philippines

Doug Perrine / Dugong or Sea cow (Dugong dugon) with a Remora (Echeneis naucrates) attached to its underside, Calauit Island, off Busuanga, Calamian Islands, Palawan, Philippines.

Pascal Kobeh / Sicklefin devil ray / Chilean devil ray (Mobula tarapacana) with two shark suckers (Remora remora) Azores, Atlantic Ocean.

Pascal Kobeh / Close-up of Horn-nosed / Largenose boxfish (Ostracion rhinorhynchos) with a striped remora (Echeneis naucrates) on its head at night, Sulu Sea, Philippines