Mikroveteens

Mikroveteens are a term used in speculative biology and science fiction to describe an imagined clade of extremely small vertebrate-like animals. In these accounts, mikroveteens inhabit microhabitats such as leaf litter, moss, and small aquatic crevices, and they challenge assumptions about the lower size limits of vertebrate life.

Individuals range roughly from 0.3 to 2 centimeters. They have a lightweight cartilaginous skeleton, a notochord in early development, and a simple skull with rudimentary jaw structures. They possess well-developed sensory organs for navigating cluttered environments, including a lateral line system and heightened olfactory and tactile sense. Their skin is often described as mucous-coated and capable of rapid slime production to reduce water loss and aid movement through tight spaces.

Mikroveteens are typically omnivorous, feeding on microinvertebrates, algae, and detritus. They may be largely nocturnal and use camouflage, rapid darting, and micro-scale burrowing to avoid predators. In fiction, some ecosystems show mikroveteens forming cooperative micro-societies, though such behavior is speculative.

Reproduction is commonly depicted as direct development, with eggs laid in moist microhabitats and hatching into miniature juveniles that resemble adults. Growth is rapid, allowing several generations per year in warm microclimates.

There is no formal recognition of mikroveteens in real-world taxonomy. The term appears predominantly in speculative literature and world-building projects as a thought experiment about size limits and vertebrate physiology.

In fictional worlds, mikroveteens are used to explore ecological interactions at small scales and to illustrate challenges of studying life in hidden microhabitats.