|Weakness||Charge, empowered Sonar|
|Appearances||Ecco the Dolphin|
Orthocones are an ancient cephalopod that resembles a squid within a cone-shaped shell. They only appeared in prehistoric levels of Ecco the Dolphin. They also appeared in some levels of Ecco Junior. The Slender Orthocone often appears with it.
Orthocones swim diagonally in a jellyfish like fashion, with short bursts of speed and pausing.