The ocean has silver dollars?

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Woah! That’s cool looking!
Same family as the oarfish, so right off the bat freaky looking.
 
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Opah is really tasty! I've seen them caught off Southern California while fishing for yellowfin tuna.
 
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Yes indeed. This is a relative of oarfishes, Lampriformis, which containes several families.
Shown is probablt Lampris guttatus, but it could be another species in the genus.

At a first and quick look, it looks incredibly similar to a large silver dollar such as those in genera Myloplus and Tometes. A closer look makes clear that the apparent similarity is not even skin deep, and the fish is quite completely different.
Among other quick external differences:
- No adipose fin
- Very different dorsal fin, extending to caudal penduncle
- Pectoral fins of completely different shape.
- Head region (including eye, mouth and operculum) smaller than in Serrasalmids
- This is a marine, pelagic, high ocean fish. Why it was found ashore, in good condition, in coastal waters is unusual as far as it is known.

Very cool. Thanks for sharing!
 
forgot:
- Pelvic fins huge (compared to those in SD's), and much forward to just below the operculum. In Serrasalmids, pelvic fins are tiny (almost not visible) and farther back
 
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I just found this thread, but decided to chime in on the taste and interesting facts about them. First off, these guys are warm-blooded fish, which I think is amazing. These guys can get huge, and I mean Massive! They are quite rare, and usually found far from coast. There is no status of population, as there is little to nothing known about the Opah. The firmness of the meat is kind of like Triggerfish, if you've ever eaten that.
 
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Not related to silver dollars or piranhas but neat fish
 
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