Is this normal behavior for a clownfish??

Jackson_H

New Member
View Badges
Joined
Oct 6, 2025
Messages
8
Reaction score
2
Rating - 0%
0   0   0
This is my first reef tank as well as my first clownfish.I have had this clownfish for about a week and a half and he’s been really good and active so far. He’s usually super active but in the past day he’s started to move pretty slow and floats near the top of the water. I’ve also seen him sit vertically at the surface of the water. Tank is fully cycled and parameters seem to be normal. I am still learning behaviors but I’ve read online that they can just be weird guys sometimes. If anyone has any idea what it could be if he’s just not being weird I would love to hear :)
View attachment 20251006_133901_F8567D49-D3E6-414A-A679-BCAA707DD3D0.mov
 

Cheese Griller

Well-Known Member
View Badges
Joined
Mar 19, 2018
Messages
579
Reaction score
628
Rating - 0%
0   0   0
That behavior is concerning. He looks to be breathing very rapidly, that combined with sitting at the surface makes me think low oxygen. Are there any other fish in the tank? If so, how are they acting?
 
OP
OP
J

Jackson_H

New Member
View Badges
Joined
Oct 6, 2025
Messages
8
Reaction score
2
Rating - 0%
0   0   0
That behavior is concerning. He looks to be breathing very rapidly, that combined with sitting at the surface makes me think low oxygen. Are there any other fish in the tank? If so, how are they acting?
He is the only fish in the tank other than a green banded goby. I have 3 hermits and a conch.
 
OP
OP
J

Jackson_H

New Member
View Badges
Joined
Oct 6, 2025
Messages
8
Reaction score
2
Rating - 0%
0   0   0
That behavior is concerning. He looks to be breathing very rapidly, that combined with sitting at the surface makes me think low oxygen. Are there any other fish in the tank? If so, how are they acting?
He is the only fish in the tank other than a green banded goby. I have 3 hermits and a conch.
From what I’ve seen the goby is fine, he just sits on a rock for a majority of the day and the hermits are very active and grazing.
 

MattyH

Community Member
View Badges
Joined
Aug 29, 2025
Messages
27
Reaction score
13
Location
VA
Rating - 0%
0   0   0
That behavior is concerning. He looks to be breathing very rapidly, that combined with sitting at the surface makes me think low oxygen. Are there any other fish in the tank? If so, how are they acting?
He is the only fish in the tank other than a green banded goby. I have 3 hermits and a conch.
From what I’ve seen the goby is fine, he just sits on a rock for a majority of the day and the hermits are very active and grazing.
Seem like the clown fish is just being strange but it’s nothing to be concerned about at the moment.
 

Jay Hemdal

10K Club member
View Badges
Joined
Jul 31, 2020
Messages
37,577
Reaction score
37,371
Location
Dundee, MI
Rating - 0%
0   0   0
This is my first reef tank as well as my first clownfish.I have had this clownfish for about a week and a half and he’s been really good and active so far. He’s usually super active but in the past day he’s started to move pretty slow and floats near the top of the water. I’ve also seen him sit vertically at the surface of the water. Tank is fully cycled and parameters seem to be normal. I am still learning behaviors but I’ve read online that they can just be weird guys sometimes. If anyone has any idea what it could be if he’s just not being weird I would love to hear :)

Can you retake the video under white lights? It is really tough to see any detail with the blue lights.

Is the clown still eating?

You mentioned that the water seems to be normal - can you post the readings?
 

Cheese Griller

Well-Known Member
View Badges
Joined
Mar 19, 2018
Messages
579
Reaction score
628
Rating - 0%
0   0   0
Seem like the clown fish is just being strange but it’s nothing to be concerned about at the moment.
Strange behavior is a reason to be concerned IMO, especially when it’s a sharp decline in activity. The floating at the surface, especially vertically oriented, is a concerning behavior
 
OP
OP
J

Jackson_H

New Member
View Badges
Joined
Oct 6, 2025
Messages
8
Reaction score
2
Rating - 0%
0   0   0
This is my first reef tank as well as my first clownfish.I have had this clownfish for about a week and a half and he’s been really good and active so far. He’s usually super active but in the past day he’s started to move pretty slow and floats near the top of the water. I’ve also seen him sit vertically at the surface of the water. Tank is fully cycled and parameters seem to be normal. I am still learning behaviors but I’ve read online that they can just be weird guys sometimes. If anyone has any idea what it could be if he’s just not being weird I would love to hear :)

Can you retake the video under white lights? It is really tough to see any detail with the blue lights.

Is the clown still eating?

You mentioned that the water seems to be normal - can you post the readings?
Here is a video with the whitest my light will go

View attachment 20251006_173503_107B8869-5834-4E9E-865F-DA4A5EA5BC16.mov
Here are my current parameters
Ammonia: 0 PPM
Nitrite: 0 PPM
Nitrate: 5.0 PPM give or take
pH: 8.3
Calcium: 440 ish. Took 23 drops to indicate
kH: 12
Phosphate: 0 PPM

And yes last night he ate some mysis shrimp.
 

Jay Hemdal

10K Club member
View Badges
Joined
Jul 31, 2020
Messages
37,577
Reaction score
37,371
Location
Dundee, MI
Rating - 0%
0   0   0
Here is a video with the whitest my light will go


Here are my current parameters
Ammonia: 0 PPM
Nitrite: 0 PPM
Nitrate: 5.0 PPM give or take
pH: 8.3
Calcium: 440 ish. Took 23 drops to indicate
kH: 12
Phosphate: 0 PPM

And yes last night he ate some mysis shrimp.

This video is a bit better. I don’t see any treatable issue though.

Does the tank have good aeration (not just circulation)? It never hurts to add aeration when a fish is breathing fast.
 
OP
OP
J

Jackson_H

New Member
View Badges
Joined
Oct 6, 2025
Messages
8
Reaction score
2
Rating - 0%
0   0   0
Here is a video with the whitest my light will go


Here are my current parameters
Ammonia: 0 PPM
Nitrite: 0 PPM
Nitrate: 5.0 PPM give or take
pH: 8.3
Calcium: 440 ish. Took 23 drops to indicate
kH: 12
Phosphate: 0 PPM

And yes last night he ate some mysis shrimp.

This video is a bit better. I don’t see any treatable issue though.

Does the tank have good aeration (not just circulation)? It never hurts to add aeration when a fish is breathing fast.
All I have is a hang on back filter and an aqua top max flow pump for water movement, what could I add or do for more aeration?
 

Jay Hemdal

10K Club member
View Badges
Joined
Jul 31, 2020
Messages
37,577
Reaction score
37,371
Location
Dundee, MI
Rating - 0%
0   0   0
All I have is a hang on back filter and an aqua top max flow pump for water movement, what could I add or do for more aeration?

Air pump and an airstone. I saw a few bubbles at the surface, but you really need bubbles travelling up through the water column. A protein skimmer also works.
 
OP
OP
J

Jackson_H

New Member
View Badges
Joined
Oct 6, 2025
Messages
8
Reaction score
2
Rating - 0%
0   0   0
Glad to hear your clowns doing better. Do you have corals in the tank? Alk reading is a little high
I actually just added my first corals yesterday!!!
I got a little zoanthid along with a Kenya tree.
 

TOP 10 Trending Threads

WHAT AMOUNT OF LIVE ROCK AND SAND SHOULD BE PRIORITIZED FOR OPTIMAL BIODIVERSITY/FILTRATION?

  • 100% live rock + bagged sand

    Votes: 34 26.6%
  • 100% dry rock + 100% live sand

    Votes: 45 35.2%
  • 50/50 live/dry rock, 50/50 live/bagged sand

    Votes: 28 21.9%
  • 75% live rock, 25% live sand

    Votes: 11 8.6%
  • 25% live rock, 75% live sand

    Votes: 10 7.8%
Back
Top