I know normally you don't want to take anything unidentified home, but I do have some reasons:
1: He was in a clump of seaweed to hide and would have most likely been washed up on shore to dry out and die or be eaten by a gull.
2: If he'd managed to stay in the water, he's so delicate-looking and bottom-based that I didn't think he'd survive long, and he definitely couldn't fight the surf. Therefore, his best chance of survival was probably with me.
3: I was fairly sure he was a goby at the time, and most gobies are good tank fish.
I normally research my fish before I obtain them, but it wasn't like I could put him back and come back in a few days to get him.
He was found in some sargassum seaweed in the surf zone. My guess is the sargassum was for hiding and not actually his house. That or I just happened to scoop him up as he was swimming near it.
And I do actually know what he eats. Bugs, basically. I gave him copepods and he quite happily ate them, and he's now eating Cyclop-Eeze if it lands on the bottom near him. He's strictly a bottom-feeder and doesn't appear to notice food over him.
I have some pictures, but all they show is a faintly fish-head-shaped grey spot and the bases of his wide fins. What are the fins that are really big on a sea robin? Not pectorals, those are the underbelly fins- right?
He's a bit over half an inch long, and he has a goby's tail, a goby's long second dorsal fin, and a goby's anal fin. Not sure if he has a small front dorsal fin like a goby. His head, fanned side fins, and the organ area of him were black when I got him. They're now a soft stone grey, I suspect just to better match his habitat. By side fins, I mean the ones he swims with... They're rather large, like in gobies and sea robins.
Below those, his pectoral fins- I can't tell if they're fused like a goby's and fanned out, or if they're those cute 'legs' on sea robins. He's too transparent.
His eyes are bumped up like a lizard's and look to be blue-ish, his mouth is a frown like both of the two, and I think his head is a bit too rounded for a sea robin... His forehead slopes down just a bit from his eyes to his mouth, more like a sea robin than a goby.
He stays on the bottom all the time, not even really lifting off to dart away when I bother him, and he hides in the chaeto clump most of the time. He doesn't perch in it, though, he just sits under it. He eats kind of like a dragonet... He'll spot food and, if it's too far, he'll hopscoot closer until he can grab it. The only time he swims away from the bottom is to chase after runaway copepods.
Do we have dragonets, by any chance?
I'm doing some research into Gulf oddball species.
Anyone know what a baby stargazer looks like? Stargazers are weird goby-looking fish that can deliver a mild shock.
What about midshipman fish? Related to toadfish, I think.
Oh, and I found three baby pufferfish, smaller than beans. Two of them puffed up when I had them in my holding tank. SO CUTE!
Don't worry, the pufferbabies deflated properly before I let them go. I checked.