Spider, white and golden coin fish maw require different identification pathways. Spider maw is read through its T-shaped head and short projections; white maw through characteristic grain, form and membranes; golden coin claims through exceptional morphology, lawful provenance and conservation scrutiny. Colour, thickness or an old label alone cannot authenticate any of the three, and damage can obscure decisive features.
Spider identification follows the head into the body
An intact spider maw usually carries a crosswise head above a raised tubular body, with several fine projections and supporting membranes. The assessor traces continuous fibres and the internal ridge rather than counting whiskers. Cut points, embossed patterns and glued additions can mimic isolated signs.
Trade routes through Thailand, Malaysia and Indonesia help contextualise origin but do not prove it. Side views and transmitted light show whether the wall distribution agrees with the claimed form. A damaged genuine piece may remain identifiable, though completeness affects confidence.
White maw is recognised by structure, not whiteness
White fish maw may be cream, gold or amber according to drying and storage. Natural grain, cut, side lines, membranes and thickness support the category. Brilliant uniform white or erased fibres deserve scrutiny because processing can alter appearance.
Trade male and female labels refer to wall distribution and culinary texture, not a universal scientific test. A thicker centre or particular line pattern should agree with the whole outline before that language is used.
Golden coin claims demand the strongest evidence
The name is associated with exceptionally scarce protected fish and recognisable coin-like or projection structures in specialist descriptions. Only documented lawful old material should enter a serious assessment. Large size, amber colour and a high former purchase cost do not establish the species.
Kam Hoi Shing can record each conclusion at the supported level: identified, plausible or unconfirmed. All three types then receive the same condition review for dry weight, oil, mould, insects, repairs and edge loss. This guide keeps rarity separate from health claims and future demand, making morphology and provenance the basis of identification.
Owners should photograph all three types differently. Spider maw needs close views of the head and projections; white maw benefits from side lines, grain and full outline; a golden coin claim requires every unusual structure plus provenance documents. One generic front photograph cannot serve all three. Tailored images reduce early misclassification and make it less likely that a rare name is attached merely because a piece is large.
Lawful documentation is particularly important for a golden coin claim. Where it is missing, caution protects the owner from an overstated identification and supports responsible trade.
