Likely the lighting is your issue and in he future - Any images best under white lighting for proper assessment. I cant tell what type anemone based on darkness of pics but some pointers on anemones- If this is a newer tank, anemones dont do well in tanks under 4 months even up to six months because they are generally sensative to water changes and require pristine conditions to stay in good shape which often requires water changes. Anything less Can result in early death and even damage to the tank parameters.
Take some time to get parameters just right and let the system cycle for a few months. This assures that conditions are stable and safe for the anemone.
Anemones prefer warmer temp and the water should be slightly on the alkali side. Monitor water regularly to assure there are no major changes. Ammonia and nitrate levels should be safe verified by using a good quality test kit and Not API either.
Here are some water parameters to follow.
- Water temp: 77°F - 80°F (stay close to the middle of this range)
- pH level: 8.1 to 8.3
- Alk: 8 to 11 dKH
- Salinity: 1.024 to 1.025
- Nitrate < 5 -10
- Phosphate < .04 - .06
Acclimation is very important for them as well as introduction. Most anemones will move around the tank until they find a suitable spot in the tank to call home. If anemone starts to move , simply direct your water flow to the coral. Anemone lighting is an important part of their care as they need good light to thrive because they’re photosynthetic which means that they absorb light to produce their inner food and growth. Anemones have zooxanthellae in their body which they feed on. Without adequate lighting, the anemone will expel the zooxanthellae which many think is poop and turn white which is bleaching and often leads to their death.
A moderate amount of flow is recommended as well as moderate light. Too much flow will cause the anemone to stretch out and look stringy. Keeping things moderate will help avoid this from happening. Avoid directing your flow directly at the anemone which stresses them.
Assure your light is moderate and flow is not excessive in your case