Sea Urchin ID

Feb 16, 2026

ItsMeMako

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Got it from a friend, I think it’s a green sea urchin

Feb 16, 2026

kitti-fish

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Can you attach a photo?

Feb 16, 2026

ItsMeMako

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kitti-fish said:
Can you attach a photo?

lol yeah it’s not working for some reason

Feb 16, 2026

ItsMeMako

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Feb 16, 2026

ItsMeMako

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ItsMeMako said:

@kitti-fish posted finally

Feb 16, 2026

mwil79

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Looks like a Pincushion urchin.

Feb 16, 2026

kitti-fish

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Yes looks like a pincushion urchin or common name being the “green sea urchin”. Very hardy little dudes!

Feb 16, 2026

Tahoe61

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Variegated.

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

Moving too quickly or adding too much at once
Votes: 7 35.0%
Skipping—or shortening—quarantine or dipping
Votes: 5 25.0%
Buying the wrong equipment the first time
Votes: 4 20.0%
Ignoring maintenance, warning signs, or redundancy
Votes: 6 30.0%
Chasing numbers or making too many changes
Votes: 3 15.0%
Choosing incompatible fish, corals, or invertebrates
Votes: 3 15.0%
Poor aquascaping or tank-design decisions
Votes: 1 5.0%
Failing to research an animal’s needs
Votes: 1 5.0%
Trusting bad advice
Votes: 3 15.0%
Doing something on the tank when you should've gone to bed
Votes: 4 20.0%
Something else—tell us below
Votes: 4 20.0%
I’m still waiting for my first expensive lesson!
Votes: 2 10.0%

Sea Urchin ID

ItsMeMako

Community Member

kitti-fish

Active Member

ItsMeMako

Community Member

ItsMeMako

Community Member

ItsMeMako

Community Member

mwil79

Well-Known Member

kitti-fish

Active Member

Tahoe61

10K Club member

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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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