| Family | Scientific Name | Author | Year | Common Name |
| Echeneidae | Remora osteochir | (Cuvier) | 1829 | Marlinsucker |
All Remora — Body not elongate, depth contained 5-8 times in standard length. Pectoral fins rounded. Color nearly uniform, without bands. Anal-fin soft rays 18-28. Caudal fin forked in young becoming emarginate or truncate in adults.
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. Total gill rakers 28-37.
Whalesucker Remora australis. Total gill rakers 17-20. Disc laminae 24-28. Hosts usually cetaceans.
Spearfish Remora Remora brachyptera. Total gill rakers 11-17. Disc laminae 27-34. Preferred hosts, billfishes. Dorsal-fin soft rays 27-34. Disc length 28-40% standard length. Pectoral-fin rays 23-27; outer two-thirds of pectoral-fin rays flexible.
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