Hi and welcome to the forum
What fishes are in the tank besides the cichlids.
What are the tank dimensions (length x width x height)?
Can you post a picture showing the entire aquarium?
Can you post pictures of all the fish or a video of the fish?
Upload videos to YouTube, then copy & paste the link here.
If you use a mobile phone to film the fish, hold the phone horizontally (landscape mode) so the footage fills the entire screen and you don't get black bars on either side.
What is the
GH (general hardness),
KH (carbonate hardness) and pH of your water supply?
This information can usually be obtained from your water supply company's website (Water Analysis Report) or by telephoning them. If they can't help you, take a glass full of tap water to the local pet shop and get them to test it for you. Write the results down (in numbers) when they do the tests. And ask them what the results are in (eg:
ppm, dGH, or something else).
African Rift Lake cichlids need a
GH above 300ppm and a pH above 7.6, depending on which lake they come from.
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The fish could be getting picked on and is hiding from the bully, or it could have a health issue. If it is new and you have only had it a few days and it's doing this now, the fish either had the health issue at the shop and they should swap it for a healthy one, or it is being bullied.