I found it in seagrass beds of Kepulauan Seribu (Seribu Island), Indonesia.
Does it have a large mouth compared to its head? the face reminds me of an anchovy
Kelsey Elizabeth Hoag
Thank you so much for your response.
Actually, i have not done to measure the meristic and morphometric of this fishes, but i have found similar species to this fishes base on its appearance. It might be Ptereleoptris microlepis (Dartfish) since it has a black band on its base of pectoral fin.
These could also be Clupeidae. Another photograph on a dark background would help. What is the position of the dorsal fin relative to the anal fin and, following up on Kelsey;s suggestion, open the mouth and determine how far back the maxillary extends.
For identification we would need more detailed photographs of the fins, especially pelvic fins, dorsal and caudal fins. Might be a gobiid or microdesmid; probably not a clupeiform, and certainly no engraulid.
Don't know an ID but they look like they spent some time in a predator's gut. It looks like the skin is gone.
You may think in DNA barcoding and fingerprinting. Just few mg of muscle tissue (or may be using fins) to extract DNA and PCR some fingerprint genes (COI, 16SrRNA mainly). Sequencing, phylogenies, and comparison to GenBank and BOLD should give good reults.
Only shall they are not formalin-fixed! (even so some there are some methodologies)
It could be larvae or postlarvae of Microdesmidae or Eliotrididae or other gobioid fish based on the fin count. Can you give some details about the method of sampling? measurements of the fish, count of fins????
Adinda;
A lot of people are interested in these animals, but we need more information from you in order to help. 1. These do look postlarval, so how big are they? 2. The problem for me is that I cannot see the fins. If you cannot get more pictures, can you please tell us- How many dorsals, if two are they joined or separated? Is caudal fin rounded (looks broken in the pictures) or forked? Are there spines in the anal fin (and how many)? Where are pelvics- abdominal or near the head (fused?)? Are pectorals ventral or up on the sides? If you can please give us more information, we can probably be more helpful.
It seems larvae or albino of Gobiids. But, I need more information about this fish. Maybe, you send me some sample of the fish to help you much more
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