What are those ?

Oct 22, 2025

Etienne 97

Active Member

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What are those kind of kind of critter my tank is around 1.5 year old

Oct 22, 2025

Sophie"s mom

2500 Club Member

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Hard to say. Could be either copepods or amphipods! Both are good to have. Hopefully someone else can come in on this.

Oct 22, 2025

Gumbies R Us

God, Bouldering, and Reefing

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I'm going to tag #reefsqaud on this one!

Oct 22, 2025

Etienne 97

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I know i have a lot of amphipods and copepods but those look like jellyfish of some sort

Oct 22, 2025

Fish Fan

Master of Disaster

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By behavior, I'm leaning towards some kind of amphipod, but admittedly they don't look like amphipods to me

Maybe @ISpeakForTheSeas will have a moment to take a look and set us all straight

WHICH TYPE OF MISTAKE TAUGHT YOU YOUR MOST EXPENSIVE REEFKEEPING LESSON?

Moving too quickly or adding too much at once
Votes: 12 31.6%
Skipping—or shortening—quarantine or dipping
Votes: 5 13.2%
Buying the wrong equipment the first time
Votes: 7 18.4%
Ignoring maintenance, warning signs, or redundancy
Votes: 12 31.6%
Chasing numbers or making too many changes
Votes: 3 7.9%
Choosing incompatible fish, corals, or invertebrates
Votes: 5 13.2%
Poor aquascaping or tank-design decisions
Votes: 4 10.5%
Failing to research an animal’s needs
Votes: 1 2.6%
Trusting bad advice
Votes: 4 10.5%
Doing something on the tank when you should've gone to bed
Votes: 5 13.2%
Something else—tell us below
Votes: 4 10.5%
I’m still waiting for my first expensive lesson!
Votes: 4 10.5%

What are those ?

Etienne 97

Active Member

Sophie"s mom

2500 Club Member

Gumbies R Us

God, Bouldering, and Reefing

Etienne 97

Active Member

Fish Fan

Master of Disaster

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WHICH TYPE OF MISTAKE TAUGHT YOU YOUR MOST EXPENSIVE REEFKEEPING LESSON?

Moving too quickly or adding too much at once

Skipping—or shortening—quarantine or dipping

Buying the wrong equipment the first time

Ignoring maintenance, warning signs, or redundancy

Chasing numbers or making too many changes

Choosing incompatible fish, corals, or invertebrates

Poor aquascaping or tank-design decisions

Failing to research an animal’s needs

Trusting bad advice

Doing something on the tank when you should've gone to bed

Something else—tell us below

I’m still waiting for my first expensive lesson!

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