| Family | Scientific Name | Author | Year | Common Name |
| Echeneidae | Remora osteochir | (Cuvier) | 1829 | Marlinsucker |
All Remora — Disc laminae 15-19. Pectoral-fin rays 20-24; pectoral-fin rays stiff to their tips in specimens longer than 150 mm standard length. Total gill rakers 11-17. Preferred hosts, billfishes. Dorsal-fin soft rays 21-27. Disc length 37-49% standard length.
Remora osteochir
Unique Characters: Total gill rakers 11-17. Disc laminae 27-34. Preferred hosts, billfishes. Dorsal-fin soft rays 21-27. Disc length 37-49% standard length. Pectoral-fin rays 20-24; pectoral-fin rays stiff to their tips in specimens longer than 150 mm standard length.
Similar Species:
Remora
Remora remora
Whalesucker Remora australis
Spearfish Remora
Remora brachyptera
Remora Remora remora. Uniformly blackish colored. Usually 16-20 disc laminae. Pectoral fin flexible. Total gill rakers 28-37.
Whalesucker Remora australis. Dark brown, darkish below. Narrow white border on dorsal and anal fins. Disc is very large, about half the length of the fish, with 24-28 laminae. Total gill rakers 17-20. . Hosts usually are cetaceans.
Spearfish Remora Remora brachyptera. Body brownish to reddish brown. Disc laminae 15-18. Pectoral-fin rays 23-27; outer two-thirds of pectoral-fin rays flexible. Total gill rakers 11-17. Preferred hosts, billfishes. Dorsal-fin soft rays 27-34. Disc length 28-40% standard length.
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