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As of January 2013, CMAS recognises world and other records for the following techniques and distances for both males and females in the age groups of Senior (i.e. 18 years and older) and Junior (i.e. 12 to 17 years old) where these are made in an Olympic-size swimming pool (i.e. 50m length) and are measured by electronic automatic officiating equipment:
All fins lack true spines. At least one account, from researchers in New Zealand, described the oarfish as giving off "electric shocks" when touched. [4] As in other members of its order, the mouth can be protruded. [7] The body has no scales. [8] In the streamer fish (Agrostichthys parkeri), the skin is clad with hard tubercles; [9] in ...
Swimfins, swim fins, diving fins, or flippers are finlike accessories worn on the feet, legs or hands [1] and made from rubber, plastic, carbon fiber or combinations of these materials, to aid movement through the water in water sports activities such as swimming, bodyboarding, bodysurfing, float-tube fishing, kneeboarding, riverboarding, scuba diving, snorkeling, spearfishing, underwater ...
Surface finswimming (also known by its acronym, SF) is swimming on the surface of the water using mask, snorkel, and monofins.SF races are held for distances of 50, 100, 200, 400, 800, 1500, 4 × 50 mix relays (2 men's, 2 women's), 4 × 100 relays and 4 × 200 relays (meters) in swimming pools and over various long distances in the open water environment.
The diver's muscle power, swimming style, and the type of aquatic activity the monofin is used for determine the choice of size, stiffness, and materials. Most monofins consist of a single, wide, glass or carbon fiber reinforced composite blade with graded flexibility, attached to the diver by two rubber foot pockets.
A DIN 7876 compliant fin comes embossed with the length and width of its footspace in millimetres, enabling the purchaser to make a more precise match between the fin and the foot. References to DIN 7876 can be found in the literature of underwater diving and in the publications of the German Life Saving Association and the German Red Cross .