| /mer, /mermaid, OR /mermaids | Opens the Mermaids mod menu and accesses the Mermaids mod command line. | mermaids (Should be given to everyone) |
| /mermaids info | Get information on the Mermaids mod installed on the server. | |
| /mermaids toggle [true/false] | You can enable or disable Mermaid transformations. | mermaids.toggle |
| /mermaids glow [true/false] | Toggle to have only your mermaid model to glow. | mermaids.glow |
| /mermaids air | Allows a player as a Mermaid to share air with nearby players. | |
| /mermaids permpotionremove | Will remove the permanent potion transformation from the player. | |
| /mermaids bug | Mermaids bug command line. | |
| /mermaids bug log | Get an information log about possible bug issues that could occur with the Mermaids mod. | |
| /mermaids bug compfix | Command to make sure the player has all of the Mermaids mod components. | |
| /mermaids bug report [Strings] | Command to report any bugs directly to the Mermaids developers Discord server. | |
| /mermaids debug | Mermaids debug command line. | mermaids.debug |
| /mermaids debug givemermaidring | Give the player a testing item called the Mermaid Ring. | mermaids.debug.mermaidring |
| /mermaids admin | Mermaids admin command line. | mermaids.admin |
| /mermaids admin reload | Reload all of the Mermaids configs. | mermaids.admin.reload |
| /mermaids admin transformmode [New Mode Integer] | Update the transformation mode with 0 to allow transforming when entering water and 1 to only allow transformation from drinking a potion. | mermaids.admin.mode |
| /mermaids admin mermaidonland [true/false] | Toggle mermaid on land for all players. | mermaids.admin.mermaidonland |
| /mermaids admin landspeeddebuff [true/false] | Toggle if the player will have a speed debuff as a mermaid on land. | mermaids.admin.mermaidonland |
| /mermaids admin itemspeed [true/false] | Toggles to allow some items to increase the swim movement speed. | mermaids.admin.itemincreasespeed |
| /mermaids admin blockstransformation [true/false] | Toggle to allow some blocks to transform players into a mermaid. | mermaids.admin.blocktransform |
| /mermaids admin raintransformation [true/false] | Toggle to allow rain to transform players into a mermaid. | mermaids.admin.raintransform |
| /mermaids admin mermaidglow [true/false] | Toggle to have the mermaid model glow. | mermaids.admin.mermaidglow |
| /mermaids admin mermaidglowradius [New Radius Integer] | Set the radius of the mermaid glow. | mermaids.admin.mermaidglow |
| /mermaids admin orbisorigins | The Orbis Origins Compatibility command line. Will only be visiable when enabled with Orbis Origins mod. | mermaids.admin.orbisorigins |
| /mermaids admin orbisorigins mermaidscontent [true/false] | Toggle to allow regular Mermaids content. If false, you can only transform into a Mermaid as a mermaid species. | mermaids.admin.orbisorigins.mermaidscontent |
| /mermaids admin orbisorigins onlyinwater [true/false] | As a mermaid species, you will only have a Mermaid tail while in water. | mermaids.admin.orbisorigins.onlyinwater |
| /mermaids admin endlessleveling | The Endless Leveling Compatibility command line. Will only be visiable when enabled with the Endless Leveling mod. | mermaids.admin.endlessleveling |
| /mermaids admin endlessleveling mermaidscontent [true/false] | Toggle to allow regular Mermaids content. If false, you can only transform into a Mermaid as a mermaid race. | mermaids.admin.endlessleveling.mermaidscontent |
| /mermaids admin endlessleveling onlyinwater [true/false] | As a mermaid race, you will only have a Mermaid tail while in water. | mermaids.admin.endlessleveling.onlyinwater |