you can print without support, however they are recommended

printed with overture black PETG on ender 3 v3 se

sliced in orcaslicer

• 8%infill
• 15° threshold angle for supports
• auto tree supports
• 0.16mm layer height, 0.2mm first layer height 

made this for my 2 baby red eared sliders! Do your own research however it's better to use PETG for a print that'll be submerged in water like this one as PLA is quite porous and can easily harbour bacteria compared to PETG. Don't get me wrong, PETG is still porous however its completely safe for aqautic animals so long as you clean it often 

furthurmore, if you're going to fully submerge it in an aquarium then you may want to use 100% infill or add weights to prevent it from floating 

🥳 MY SECOND MODEL WOO HOO! 🥳