The White-Tipped Shark Cat is one of the few catfish that actually have a close resemblance to a shark, hence the name.
They are fairly peaceful though smaller tank mates will become food as it grows.
They are brackish fish by nature and found around brackish environments in the wild so low brackish is needed as juveniles with the salinity needing to be increased as they grow.
Note, they grow to 14" and require a bigger tank.
Size is currently around 2".