ramshorn
Coiled aquarium gastropod
A ramshorn is a snail with a flat, coiled shell resembling a ram's horn, common in freshwater aquariums where they serve as algae cleaners—though some consider them pests.
The shape appears in other contexts: ramshorn hooks, ramshorn handles.
In medicine, a ramshorn nail curves dramatically downward over the toe tip.
Tank for keeping fish
- freshwaterNon-saline aquatic environment
- pondSmall still body
- algaePrimitive aquatic photosynthesizers
- gastropodSingle-shelled soft creature
mollusk · invertebrate · pest · breeding · tank · detritus · scavenger · hitchhiker
Wound circular arrangement
- whorlSpiral arrangement of ridges
- helixSpiraling three-dimensional curve
- curvatureDeviation from flatness
- scrollWound document of parchment
volute · logarithmic spiral · convolution · curl · geometry · pattern · growth rings · chambered
Element twenty, builds bones
- operculumAnatomical lid structure
- nacreIridescent shell coating
- apertureAdjustable optical inlet
- columellaSmall central supporting shaft
sinistral · dextral · translucent · fragile · disc-shaped · brown · olive · leopard
Extinct spiral-shelled cephalopod
- paleontologyStudy of ancient organisms
- petrificationBecoming rock-like
- mineralizationConversion to mineral form
- sedimentParticles settling in liquid
stratigraphy · geology · Jurassic · Cretaceous · fossilization · extinction · cephalopod · nautiloid
aquarium
Tank for keeping fish
- freshwaterNon-saline aquatic environment
- pondSmall still body
- algaePrimitive aquatic photosynthesizers
gastropod · mollusk · invertebrate · pest · breeding · tank · detritus · scavenger · hitchhiker · population
coil
Wound circular arrangement
- whorlSpiral arrangement of ridges
- helixSpiraling three-dimensional curve
- curvatureDeviation from flatness
scroll · volute · logarithmic spiral · convolution · curl · geometry · pattern · growth rings · chambered · suture
calcium
Element twenty, builds bones
columella · sinistral · dextral · translucent · fragile · disc-shaped · brown · olive · leopard · coloration
ammonite
Extinct spiral-shelled cephalopod
- paleontologyStudy of ancient organisms
- petrificationBecoming rock-like
- mineralizationConversion to mineral form
sediment · stratigraphy · geology · Jurassic · Cretaceous · fossilization · extinction · cephalopod · nautiloid · coiled shell
- aquarium snailsapple snail, nerite, pond snail
- ramshorn snails
- land snailsland snail, snail, escargot, snail shell, air-breathing