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70 guides · Page 10 of 12
A striking image of a vibrant blue Betta fish with flowing fins on a black background.

Fishes / Health

What to Do When Your Betta Fish Is Not Pooping

Betta constipation is common, usually straightforward to resolve, and worth catching early, since left unaddressed it can progress toward more serious swim bladder trouble. The good news is that most

3 min read

A vividly colorful coral reef ecosystem showcasing diverse marine life.

Fishes / Health

Flashing in Marine Fish: Causes and Treatment

Flashing, when a fish suddenly darts and scrapes its body against rock, substrate or the glass, is a fish's way of trying to relieve an itch it cannot reach with a fin. It's a symptom rather than a di

2 min read

Underwater view of a vibrant coral reef with marine life, showcasing the richness of ocean biodiversity.

Fishes / Health

Hole-in-the-Head Disease in Saltwater Fish

Hole-in-the-head disease, also called head and lateral line erosion (HLLE), produces small pits and lesions around a fish's head, eyes and along its lateral line. It's disfiguring rather than usually

2 min read

Close-up of a vibrant Betta fish swimming gracefully in a glass aquarium.

Fishes / Health

What to Do When Your Betta Fish Is Not Eating

A betta refusing food is alarming, but it is also one of the more common questions new keepers ask, and the good news is that most cases have a clear, fixable cause. Understanding roughly how long a h

3 min read

Detailed image of a hermit crab in a striped shell reflected on a glossy black surface.

Fishes / Health

What to Do If Your Reef Tank Hermit Crab Loses a Leg

Hermit crabs, whether blue leg, scarlet reef or electric blue varieties, are reef tank staples valued for their clean-up work, and losing a leg is one of the more alarming things a keeper can see happ

2 min read