David Hall / Barred conger eel (Ariosoma fasciatus) head poking through gravel. Pantar, Alor Archipelago, Indonesia.

Constantinos Petrinos / Barred sand conger eel (Ariosoma fasciatum) Lembeh Strait, North Sulawesi, Indonesia.

Pascal Kobeh / Barred sand conger (Ariosoma fasciatum or Poeciloconger fasciatus) head sticking out of burrow in sea floor, Sulu Sea, Philippines

Jose B. Ruiz / Bandtooth conger {Ariosoma balearicum} Nocturnal species that spends the day buried in sand. Mediterranean.

Jose B. Ruiz / Bandtooth conger {Ariosoma balearicum} Nocturnal species that spends the day buried in sand. Mediterranean.

Jose B. Ruiz / Bandtooth conger {Ariosoma balearicum} buried in sand, where it rests during the day, nocturnal, Mediterranean.