Latest Common remora Stories
Our knowledge of these strange-looking fish has come a long way, as scientists have just reported that the remora’s signature disc is actually a greatly modified dorsal fin.
The Spearfish remora, Remora brachyptera, is a remora of the family Echeneidae, found circumglobally in tropical and subtropical seas. Its length is up to (50 cm). The spearfish remora is an elongate round-bodied fish, with a large oval suction disc on top of the head. This disc is actually a highly modified first dorsal fin with a raised flattened edge that acts as a seal, and a series of horizontal septae that can be moved so as to create a vacuum in a sealed chamber. Using this device...
- A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction.