Grunion classified in the family Atherinopsidae along with other New World silversides including the jacksmelt and topsmelt. The California grunion, "L. tenuis", is found along the Pacific Coast from Point Conception, California, to Punta Abreojos, Baja California Sur. They are rarely found between San Francisco in the north and San Juanico Bay, Baja California Sur, in the south. The Gulf grunion, "L. sardina", is found along the coast of Baja California in the Gulf of California. Inhabiting the nearshore waters from the surf to a depth of , marking experiments indicate they are not migratory. They are small, slender fish with
Creature type (Dungeons & Dragons) an insect, arachnid, arthropod, worm, or other invertebrate. Some have magical abilities, and others are giant versions of real insects. Most vermin are considered mindless individually. Since many vermin are too small to model individually, they are often represented as swarms (clusters that act like single creatures and sometimes have hive minds). In 4th edition, type was split into types and origins. "Beast", "humanoid" and "monstrous humanoid" remained classified as creature types, while many subtypes from earlier editions were converted to keywords, as were some types, such as "undead" and "construct". "Animates" are magically animated creatures, such as golems, zombies