| Family | Scientific Name | Author | Year | Common Name |
| Microdesmidae | Ptereleotris calliura | (Jordan and Gilbert) | 1882 | Blue Dartfish |
Ptereleotris calliura
Unique Characters: First dorsal fin with 6 or fewer spines. Second dorsal fin with more than 20 elements. Pelvic fins separate, with 1 spine and 4 soft rays. Black stripe near edge of dorsal fins. Caudal fin lanceolate.
Similar Species: Pink Wormfish Microdesmus longipinnis. Elongate fishes with single continuous dorsal fin including 10-28 spines and 28-66 soft rays. Mouth small, with protruding lower jaw. Pelvic fins small, separate, with 1 spine and 3 soft rays.
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