Jan Hamrsky / Brine shrimp or monkey shrimp (Artemia salina) female. Controlled conditions.

Jan Hamrsky / Diving beetle larva (Hyphydrus ovatus), Europe, June. Controlled conditions.

Jan Hamrsky / Diving beetle (Haliplus ruficollis), Europe, June. Controlled conditions.

Jan Hamrsky / Diving beetle (Colymbetes fuscus) close up head portrait. Europe, June. Controlled conditions.

Jan Hamrsky / Summer mayfly nymph (Siphlonurus lacustris), Europe, May. Controlled conditions.

Jan Hamrsky / Summer mayfly nymphs (Siphlonurus lacustris), Europe, May. Controlled conditions.

Jan Hamrsky / Case-building caddisfly larva (Trichoptera), Europe, June. Controlled conditions.

Jan Hamrsky / Hacklegill mayfy nymph (Potamanthus luteus), Europe, July. Controlled conditions.

Jan Hamrsky,Jan Hamrsky / Trumpet animalcules (Stentor polymorphus) with algal symbionts (Chlorella), Europe, controlled conditions

Jan Hamrsky / Great diving beetle (Dytiscus marginalis) portrait, Europe, September, controlled conditions

Jan Hamrsky,Jan Hamrsky / Darner dragonfly nymph (Aeshnidae) portrait, Europe, July, controlled conditions

Jan Hamrsky / Black fly pupae (Simuliidae) attached to the stem of aquatic plant, Europe, August, controlled conditions