Any eels or predatory fish i can keep in a 30 gallon

I wouldn't recommend any of the traditional "predatory" fish. Perhaps a golden dwarf eel could be maintained, but they are very hard to find nowadays, and usually upwards of 300$. Other predators (anglers, dwarf lions etc) often have difficult diets, requiring a consistent supply of live feeders. There are some substitutes, though. If you are looking for something that looks like a grouper and acts like a royal gramma, I'd recommend a harlequin or lantern basslet. Pike blennies look somewhat like tiny eels. You could also keep any of the dwarf Canthigaster puffers. I hope that this helps!
 
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AsYeah but there hard to find
That’s the case with almost every predator fish outside of the lions. Not many LFSs want predatory fish (Due to the diets and some being venomous) so they don’t really enter the market
 
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For fish a Angler would be my first choice but they often will require live food which can be difficult. Probably one of my most interesting and all time favorites. Of course Dwarf Lion would also be an option and would likely be easier to get on frozen food. As for Eel's, I would recommend a Jewel Moray! Its a really cool looking Moray and gets to about 2 ft max (if your lucky, they are usually a bit smaller) and would probably be fine in a 30 gallon tank based off my experience having one for several years. Your rock work will have to be very secure and you will need a very tight fitting lid on your tank unless you want eel jerky on the floor when you wake up in the morning.
 
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For fish a Angler would be my first choice but they often will require live food which can be difficult. Probably one of my most interesting and all time favorites. Of course Dwarf Lion would also be an option and would likely be easier to get on frozen food. As for Eel's, I would recommend a Jewel Moray! Its a really cool looking Moray and gets to about 2 ft max (if your lucky, they are usually a bit smaller) and would probably be fine in a 30 gallon tank based off my experience having one for several years. Your rock work will have to be very secure and you will need a very tight fitting lid on your tank unless you want eel jerky on the floor when you wake up in the morning.
I have some small clowns so i cant get a lion thats why i wondering if theres a small eel that I could get
 
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Soapfish
I have some small clowns so i cant get a lion thats why i wondering if theres a small eel that I could get
https://www.reef2reef.com/threads/how-bad-of-an-idea-is-an-eel.946530/page-2#post-10748932
Eels in the trade:

Morays:
  • Gymnotherax - known as the "fang toothed morays" are the most specious moray eel genus. Their diet is primarily fish though they are opportunistic hunters. Size range 1'-8'.
  • Echidna - known as the "pebble toothed morays" are another common fish in the trade that hunts crustaceans. They have blunt teeth that crush. Not great at hunting fish.Size range 2'-3'.
  • Gymnomuraena - Zebra moray eel. related to echidnas but much bigger any very peaceful. Size 5'.
  • Rhinomuraena and Pseudechidna: The ribbon and ghost eel. Long skinny and beautiful. Only eat live fish and usually die very fast in tanks.

Other:
  • Garden eels - Expert fish with deep and open sand-bed.
  • Myrichthys snake eels - The moray like snake eels. Read my article.
Fake eels:
  • Wolf eel - Want the aggression of a dotty back in eel size than this for you.
  • Engineer goby - Goby at the front, eel at the back.
 
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Soapfish

https://www.reef2reef.com/threads/how-bad-of-an-idea-is-an-eel.946530/page-2#post-10748932
Eels in the trade:

Morays:
  • Gymnotherax - known as the "fang toothed morays" are the most specious moray eel genus. Their diet is primarily fish though they are opportunistic hunters. Size range 1'-8'.
  • Echidna - known as the "pebble toothed morays" are another common fish in the trade that hunts crustaceans. They have blunt teeth that crush. Not great at hunting fish.Size range 2'-3'.
  • Gymnomuraena - Zebra moray eel. related to echidnas but much bigger any very peaceful. Size 5'.
  • Rhinomuraena and Pseudechidna: The ribbon and ghost eel. Long skinny and beautiful. Only eat live fish and usually die very fast in tanks.

Other:
  • Garden eels - Expert fish with deep and open sand-bed.
  • Myrichthys snake eels - The moray like snake eels. Read my article.
Fake eels:
  • Wolf eel - Want the aggression of a dotty back in eel size than this for you.
  • Engineer goby - Goby at the front, eel at the back.
Can i have a engineer goby in a 30 gallon?
 
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Yes
At least you can for a long time and possibly forever. They can get up to 2' but they grow slowly.
https://www.saltwateraquariumblog.com/engineer-goby-cichlid-of-the-sea/
E2DD0A2D-EF10-447B-8F1E-C50989C67DF2.jpeg

Is this a engineer goby
 
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Yes but was that taken at night? Its usually yellow and black.
That’s a surprise to hear they’re yellow and black normally in the day - mine was always white/cream and black, never a deep yellow like the ones in your photos.
 
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