I love Angler fish, and I wanted to add one to my tank once it is mature and has been running for a while. I have a question, though: Is it difficult to keep a black-spotted anglerfish in a 30-gallon tank, or should it be in something bigger?
I think these fish are difficult to keep in general, requiring live food. Some brief online searching shows these fish also get up to 9 inches long - 30 gallon tank is too small. Do your research thoroughly please, just because a fish looks cool and you can afford it doesn't mean it's a good idea.