There's a number or reasons why it may sink..
1. It has died
2. It has adjusted it's buoyancy to make itself sink
3. Constipation or bloating from overfeeding putting pressure on the swim bladder
4. Disease or parasite may affect the swim bladder causing the fish to lose control of its buoyancy.
Yes, betta fish can eat food that sinks to the bottom of the tank. They are known to be opportunistic feeders and will often search for food at different levels of the tank. It is important to ensure that the food is appropriate for betta fish and does not cause water quality issues.
It probably means is going to die. It might be just going to sleep
There are half moon betta, delta betta, round tail betta, long tailed betta, crown tailed betta, king betta, and others I don't know of yet.
A betta is a fish of the species Betta, especially Betta splendens, commonly known as the Siamese fighting fish.
From a female Betta. Then the male Betta fertilizes them when they breed together.
a wild betta
A betta can eat any betta food regardless of the manufacturer; they typically market it as Betta Bites.
no because male betta's are really aggressive to other betta's which plakats are male's. but female betta's can stay with other females. don't try to, one of your betta's are going to end up dead.
"Poisson Betta"
The wild betta from southeast Asia
No betta fish are carnivores.
A female betta has very small fins with a long body while the male betta have lots of nice flowing fins.